perl_langinfo.h: Fix to work on Android #22650
Merged
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See GH #22627.
libc has a few locale categories that aren't used elsewhere, AFAIK. Android has a crippled implementation of them, in that it has none of the items that comprise the categories.
In a typical langinfo.h, these are enum fields, so their existence can't be checked with an #ifdef, but in Android, everything is a #define, so much be checked with #ifdef. To get around this without writing a Configure probe, this commit just creates defines when they are missing the category (which catches the non-Androids) or when using Android.