libc/eglibc: fix localedef 2.14 build

The localedef of eglibc 2.14 requires NOT_IN_libc to be defined in order to
compile intl/l10nflist.c.

This is because localedef is built separately from eglibc and uses some parts of
eglibc that don't compile in standalone without this preprocessor definition.

This fixes the following error:

[ALL ] gcc -g -O2 -DNO_SYSCONF -DNO_UNCOMPRESS
-DLOCALE_PATH='"/usr/lib/locale:/usr/share/i18n"'
-DLOCALEDIR='"/usr/lib/locale"' -DLOCALE_ALIAS_PATH='"/usr/share/locale"'
-DCHARMAP_PATH='"/usr/share/i18n/charmaps"'
-DREPERTOIREMAP_PATH='"/usr/share/i18n/repertoiremaps"'
-DLOCSRCDIR='"/usr/share/i18n/locales"' -Iglibc/locale/programs -Iglibc/locale
-I/<snip>/.build/src/eglibc-localedef-2_14/include
-I/<snip>/.build/src/eglibc-localedef-2_14 -I.
-include /<snip>/.build/src/eglibc-localedef-2_14/include/always.h -Wall
-Wno-format -c -o locarchive.o glibc/locale/programs/locarchive.c
[ALL ] glibc/locale/programs/locarchive.c: In function 'enlarge_archive':
[ALL ] glibc/locale/programs/locarchive.c:303:21: warning: variable
'oldlocrectab' set but not used [-Wunused-but-set-variable]
[ALL ] In file included from glibc/locale/programs/locarchive.c:651:0:
[ALL ] glibc/locale/programs/../../intl/l10nflist.c: In function
'_nl_normalize_codeset':
[ERROR] glibc/locale/programs/../../intl/l10nflist.c:342:9: error:
'_nl_C_locobj_ptr' undeclared (first use in this function)
[ALL ] glibc/locale/programs/../../intl/l10nflist.c:342:9: note: each
undeclared identifier is reported only once for each function it appears in
[ALL ] glibc/locale/programs/locarchive.c: In function
'add_locales_to_archive':
[ALL ] glibc/locale/programs/locarchive.c:1450:7: warning: passing argument
1 of '__xpg_basename' discards 'const' qualifier from pointer target type
[enabled by default]
[ALL ] /usr/include/libgen.h:35:14: note: expected 'char *' but argument is
of type 'const char *'
[ERROR] make[1]: *** [locarchive.o] Error 1

Signed-off-by: "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>
(transplanted from 4cd9134739b594451794cf61a6e1b137422cdafd)

 Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/00_all_gcc-trampolinewarn.patch

 	This trivial patch causes gcc to emit a warning whenever

 	it generates a trampoline.  These are otherwise hard to

 	locate.  It is rigged to default ON - to have it default

 	to OFF remove the text 'Init(1)' from the common.opt

 	patch, leaving just 'Common Var(warn_trampolines)'.

 	Kevin F. Quinn <kevquinn@gentoo.org> 17 Jan 2006

 diff -durN gcc-4.3.1.orig/gcc/builtins.c gcc-4.3.1/gcc/builtins.c

 --- gcc-4.3.1.orig/gcc/builtins.c	2008-04-23 00:36:27.000000000 +0200

 +++ gcc-4.3.1/gcc/builtins.c	2008-06-10 14:56:54.000000000 +0200

 @@ -5662,6 +5662,9 @@

    trampolines_created = 1;

    INITIALIZE_TRAMPOLINE (r_tramp, r_func, r_chain);

 +  if (warn_trampolines)

 +    warning (OPT_Wtrampolines, "generating trampoline in object (requires executable stack)");

 +

    return const0_rtx;

  }

 diff -durN gcc-4.3.1.orig/gcc/common.opt gcc-4.3.1/gcc/common.opt

 --- gcc-4.3.1.orig/gcc/common.opt	2008-01-22 15:11:44.000000000 +0100

 +++ gcc-4.3.1/gcc/common.opt	2008-06-10 14:56:54.000000000 +0200

 @@ -182,6 +182,10 @@

  Common Var(warn_system_headers) Warning

  Do not suppress warnings from system headers

 +Wtrampolines

 +Common Var(warn_trampolines) Init(1)

 +Warn whenever a trampoline is generated

 +

  Wuninitialized

  Common Var(warn_uninitialized) Warning

  Warn about uninitialized automatic variables