GNUInstallDirs: Update FreeBSD "info" destination to share/info

FreeBSD ports commit r484628 (Install texinfo files (GNU info) into
${PREFIX}/share/info, 2018-11-10) changed the "info" destination
from "info" to "share/info".  The commit included a patch to their
distribution of CMake to fix the `GNUInstallDirs` module too.
Apply a similar logic change to our upstream version of the module.

We already made a similar change for GNU/kFreeBSD in commit
v3.13.0-rc2~8^2 (GNUInstallDirs: Don't use BSD info and man paths on
GNU/kFreeBSD, 2018-10-21).

Fixes: #18585

Modules/GNUInstallDirs.cmake

@@ -277,7 +277,7 @@ _GNUInstallDirs_cache_path(CMAKE_INSTALL_DATAROOTDIR "share"
 _GNUInstallDirs_cache_path_fallback(CMAKE_INSTALL_DATADIR "${CMAKE_INSTALL_DATAROOTDIR}"
   "Read-only architecture-independent data (DATAROOTDIR)")
 
-if(CMAKE_SYSTEM_NAME MATCHES "^(([^k].*)?BSD|DragonFly)$")
+if(CMAKE_SYSTEM_NAME MATCHES "^(([^kF].*)?BSD|DragonFly)$")
   _GNUInstallDirs_cache_path_fallback(CMAKE_INSTALL_INFODIR "info"
     "Info documentation (info)")
 else()

Tests/RunCMake/GNUInstallDirs/Opt-FreeBSD-stderr.txt

@@ -3,7 +3,7 @@ CMAKE_INSTALL_DATADIR='share'
 CMAKE_INSTALL_DATAROOTDIR='share'
 CMAKE_INSTALL_DOCDIR='share/doc/Opt'
 CMAKE_INSTALL_INCLUDEDIR='include'
-CMAKE_INSTALL_INFODIR='info'
+CMAKE_INSTALL_INFODIR='share/info'
 CMAKE_INSTALL_LIBDIR='(lib|lib64)'
 CMAKE_INSTALL_LIBEXECDIR='libexec'
 CMAKE_INSTALL_LOCALEDIR='share/locale'
@@ -18,7 +18,7 @@ CMAKE_INSTALL_FULL_DATADIR='/opt/Opt/share'
 CMAKE_INSTALL_FULL_DATAROOTDIR='/opt/Opt/share'
 CMAKE_INSTALL_FULL_DOCDIR='/opt/Opt/share/doc/Opt'
 CMAKE_INSTALL_FULL_INCLUDEDIR='/opt/Opt/include'
-CMAKE_INSTALL_FULL_INFODIR='/opt/Opt/info'
+CMAKE_INSTALL_FULL_INFODIR='/opt/Opt/share/info'
 CMAKE_INSTALL_FULL_LIBDIR='/opt/Opt/(lib|lib64)'
 CMAKE_INSTALL_FULL_LIBEXECDIR='/opt/Opt/libexec'
 CMAKE_INSTALL_FULL_LOCALEDIR='/opt/Opt/share/locale'

Tests/RunCMake/GNUInstallDirs/Root-FreeBSD-stderr.txt

@@ -3,7 +3,7 @@ CMAKE_INSTALL_DATADIR='usr/share'
 CMAKE_INSTALL_DATAROOTDIR='usr/share'
 CMAKE_INSTALL_DOCDIR='usr/share/doc/Root'
 CMAKE_INSTALL_INCLUDEDIR='usr/include'
-CMAKE_INSTALL_INFODIR='usr/info'
+CMAKE_INSTALL_INFODIR='usr/share/info'
 CMAKE_INSTALL_LIBDIR='usr/(lib|lib64)'
 CMAKE_INSTALL_LIBEXECDIR='usr/libexec'
 CMAKE_INSTALL_LOCALEDIR='usr/share/locale'
@@ -18,7 +18,7 @@ CMAKE_INSTALL_FULL_DATADIR='/usr/share'
 CMAKE_INSTALL_FULL_DATAROOTDIR='/usr/share'
 CMAKE_INSTALL_FULL_DOCDIR='/usr/share/doc/Root'
 CMAKE_INSTALL_FULL_INCLUDEDIR='/usr/include'
-CMAKE_INSTALL_FULL_INFODIR='/usr/info'
+CMAKE_INSTALL_FULL_INFODIR='/usr/share/info'
 CMAKE_INSTALL_FULL_LIBDIR='/usr/(lib|lib64)'
 CMAKE_INSTALL_FULL_LIBEXECDIR='/usr/libexec'
 CMAKE_INSTALL_FULL_LOCALEDIR='/usr/share/locale'

Tests/RunCMake/GNUInstallDirs/Usr-FreeBSD-stderr.txt

@@ -3,7 +3,7 @@ CMAKE_INSTALL_DATADIR='share'
 CMAKE_INSTALL_DATAROOTDIR='share'
 CMAKE_INSTALL_DOCDIR='share/doc/Usr'
 CMAKE_INSTALL_INCLUDEDIR='include'
-CMAKE_INSTALL_INFODIR='info'
+CMAKE_INSTALL_INFODIR='share/info'
 CMAKE_INSTALL_LIBDIR='(lib|lib64|lib/arch)'
 CMAKE_INSTALL_LIBEXECDIR='libexec'
 CMAKE_INSTALL_LOCALEDIR='share/locale'
@@ -18,7 +18,7 @@ CMAKE_INSTALL_FULL_DATADIR='/usr/share'
 CMAKE_INSTALL_FULL_DATAROOTDIR='/usr/share'
 CMAKE_INSTALL_FULL_DOCDIR='/usr/share/doc/Usr'
 CMAKE_INSTALL_FULL_INCLUDEDIR='/usr/include'
-CMAKE_INSTALL_FULL_INFODIR='/usr/info'
+CMAKE_INSTALL_FULL_INFODIR='/usr/share/info'
 CMAKE_INSTALL_FULL_LIBDIR='/usr/(lib|lib64|lib/arch)'
 CMAKE_INSTALL_FULL_LIBEXECDIR='/usr/libexec'
 CMAKE_INSTALL_FULL_LOCALEDIR='/usr/share/locale'

Tests/RunCMake/GNUInstallDirs/UsrLocal-FreeBSD-stderr.txt

@@ -3,7 +3,7 @@ CMAKE_INSTALL_DATADIR='share'
 CMAKE_INSTALL_DATAROOTDIR='share'
 CMAKE_INSTALL_DOCDIR='share/doc/UsrLocal'
 CMAKE_INSTALL_INCLUDEDIR='include'
-CMAKE_INSTALL_INFODIR='info'
+CMAKE_INSTALL_INFODIR='share/info'
 CMAKE_INSTALL_LIBDIR='(lib|lib64)'
 CMAKE_INSTALL_LIBEXECDIR='libexec'
 CMAKE_INSTALL_LOCALEDIR='share/locale'
@@ -18,7 +18,7 @@ CMAKE_INSTALL_FULL_DATADIR='/usr/local/share'
 CMAKE_INSTALL_FULL_DATAROOTDIR='/usr/local/share'
 CMAKE_INSTALL_FULL_DOCDIR='/usr/local/share/doc/UsrLocal'
 CMAKE_INSTALL_FULL_INCLUDEDIR='/usr/local/include'
-CMAKE_INSTALL_FULL_INFODIR='/usr/local/info'
+CMAKE_INSTALL_FULL_INFODIR='/usr/local/share/info'
 CMAKE_INSTALL_FULL_LIBDIR='/usr/local/(lib|lib64)'
 CMAKE_INSTALL_FULL_LIBEXECDIR='/usr/local/libexec'
 CMAKE_INSTALL_FULL_LOCALEDIR='/usr/local/share/locale'