scratch_buffer: adjust to glibc changes Problem reported by Karl Berry in: https://lists.gnu.org/r/bug-gnulib/2022-11/msg00004.html * build-aux/depcomp, doc/make-stds.texi, lib/malloc/scratch_buffer.h: Autoupdate. * build-aux/install-reloc (func_create_wrapper): Omit removed file scratch_buffer_dupfree.c. * config/srclist.txt: Remove lib/malloc/scratch_buffer_dupfree.c * lib/canonicalize-lgpl.c: Merge changes from glibc through its commit ef0700004bf0dccf493a5e8e21f71d9e7972ea9f dated 2022-07-05 11:04:45 +0200. (__strdup) [!_LIBC]: New macro. (struct realpath_bufs): New type. (realpath_stk): Use it as the extra argument. All uses changed. No longer any need for noinline or GCC_BOGUS_WRETURN_LOCAL_ADDR. * lib/canonicalize.c (struct realpath_bufs) (canonicalize_filename_mode_stk): Likewise. * lib/malloc/scratch_buffer_dupfree.c: Remove, since it was removed in glibc. * lib/scratch_buffer.h (scratch_buffer_dupfree) [0]: (__libc_scratch_buffer_dupfree): Remove decls. * modules/relocatable-prog-wrapper (Files): * modules/scratch_buffer (Files, lib_SOURCES): Remove lib/malloc/scratch_buffer_dupfree.c.