Tests: Set LC_MESSAGES for RunCMake.Make

LANG was already set, but is not enough on some systems. Set
LC_MESSAGES too.

Tests/RunCMake/Make/RunCMakeTest.cmake

@@ -27,12 +27,15 @@ function(run_VerboseBuild)
   run_cmake_command(VerboseBuild-build ${CMAKE_COMMAND} --build . -v --clean-first)
   unset(RunCMake-stdout-file)
   set(_backup_lang "$ENV{LANG}")
+  set(_backup_lc_Messages "$ENV{LC_MESSAGES}")
   if(MAKE_IS_GNU)
     set(RunCMake-stdout-file VerboseBuild-nowork-gnu-stdout.txt)
     set(ENV{LANG} "C")
+    set(ENV{LC_MESSAGES} "C")
   endif()
   run_cmake_command(VerboseBuild-nowork ${CMAKE_COMMAND} --build . --verbose)
   set(ENV{LANG} "${_backup_lang}")
+  set(ENV{LC_MESSAGES} "${_backup_lc_messages}")
 endfunction()
 run_VerboseBuild()