ENH: Also add ARCHLIB/CORE to include search paths so perl.h can be found on non-standard install prefixes

Modules/FindPerlLibs.cmake

@@ -160,6 +160,7 @@ if (PERL_EXECUTABLE)
 
   ### PERL_POSSIBLE_INCLUDE_PATHS
   set(PERL_POSSIBLE_INCLUDE_PATHS
+    ${PERL_ARCHLIB}/CORE
     /usr/lib/perl5/${PERL_VERSION}/${PERL_ARCHNAME}/CORE
     /usr/lib/perl/${PERL_VERSION}/${PERL_ARCHNAME}/CORE
     /usr/lib/perl5/${PERL_VERSION}/CORE