* include/stdlib.h: Add libc_hidden_proto for strto*, __strto*_l.

* include/stdlib.h: Add libc_hidden_proto for strto*, __strto*_l.

	Remove __strto*_l inlines.
	* include/wchar.h: Add libc_hidden_proto for wcsto*, __wcsto*_l.
	* stdlib/strtod.c: Add libc_hidden_def.
	* stdlib/strtod_l.c: Likewise.
	* stdlib/strtold.c [__LONG_DOUBLE_MATH_OPTIONAL]: Add libc_hidden_proto
	for __new_strtold and __new_wcstold.
	* sysdeps/ieee754/ldbl-128ibm/strtold_l.c: Add libc_hidden_proto for
	__STRTOF, STRTOF.
	* stdlib/strtol.c: Add libc_hidden_def.
	* stdlib/strtol_l.c: Likewise.
	* sysdeps/wordsize-64/strtol.c: Add libc_hidden_ver for strtoll and
	strtoq.

	* scripts/data/localplt-powerpc-linux-gnu.data: New file.

	* scripts/data/localplt-x86_64-linux-gnu.data: File renamed to ...
	* scripts/data/localplt-generic.data: ... here.
	* elf/Makefile (check-data): Get generic file if no other.
	($(objpfx)check-localplt.out): Make target unconditional.