* include/sys/resource.h: Use libc_hidden_proto for getpriority,

* include/sys/resource.h: Use libc_hidden_proto for getpriority,

	setpriority.
	* sysdeps/unix/sysv/linux/getpriority.c: Add libc_hidden_def.
	* sysdeps/unix/sysv/irix4/getpriority.c: Likewise.
	* sysdeps/mach/hurd/setpriority.c: Likewise.
	* sysdeps/mach/hurd/getpriority.c: Likewise.
	* sysdeps/generic/setpriority.c: Likewise.
	* sysdeps/generic/getpriority.c: Likewise.

	* include/mcheck.h: Use libc_hidden_proto for mcheck_check_all.
	* malloc/mcheck.c: Add libc_hidden_def.

	* include/search.h: Use libc_hidden_proto for hcreate_r, hdestroy_r.
	* misc/hsearch_r.c: Add libc_hidden_def.

	* include/fnmatch.h: Use libc_hidden_proto for fnmatch.
	* posix/fnmatch.c: Add libc_hidden_weak.