Allow to compile if don't have LC_CTYPE etc defined

Allow to compile if don't have LC_CTYPE etc defined

Commit d6ded95025185cb1ec8ca3ba5879cab881d8b180 introduced
the ability to specify individual category parameters to 'use locale'.
However in doing so, it causes Perl to not be able to compile on
platforms that don't have some or all of those categories defined, such
as Android.  This commit uses #ifdefs to remedy that.