re PR other/31405 (fixincludes needed for wchar from glibc 2.3.6)

re PR other/31405 (fixincludes needed for wchar from glibc 2.3.6)

	PR other/31405
	* inclhack.def: (glibc_c99_inline_1a): Re-add last change.
	(glibc_c99_inline_3) <bypass>: Change from __STDC_VERSION__ to
	__extern_inline|__GNU_STDC_INLINE__.
	(glibc_c99_inline_4) <files>: Add wchar.h and */wchar.h.
	<bypass>: Change from __STDC_VERSION__ to
	__extern_inline|__GNU_STDC_INLINE__.
	<first c_fix_arg>: Change from #ifdef-wrapping the extern part to
	appending attribute-gnu_inline.
	<second c_fix_arg>: Remove.
	<test_text>: Remove __extern_inline line.
	* tests/base/features.h: Re-add.
	* tests/base/sys/sysmacros.h: Adjust.
	* fixincl.x: Regenerate.

(Oops: forgot PR-annotation.)

From-SVN: r132093