DragonOS-Community/relibc: 为DragonOS移植了的relibc @ d1a424c00218b5ec6f767f74cb8d7b517bfb5cf7

kopia lustrzana https://github.com/DragonOS-Community/relibc

Tibor Nagy d1a424c002 tests: Replace returns with exits in the main functions		6 lat temu
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mbrtowc.c	ff874c87d7 tests: Fix function signatures	6 lat temu
mbsrtowcs.c	ff874c87d7 tests: Fix function signatures	6 lat temu
putwchar.c	d1a424c002 tests: Replace returns with exits in the main functions	6 lat temu
wcrtomb.c	ff874c87d7 tests: Fix function signatures	6 lat temu