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)

 diff --git a/mpn/generic/toom44_mul.c b/mpn/generic/toom44_mul.c

 --- a/mpn/generic/toom44_mul.c

 +++ b/mpn/generic/toom44_mul.c

 @@ -116,17 +116,16 @@

    TMP_MARK;

 -  as1  = TMP_SALLOC_LIMBS (n + 1);

 -  asm1 = TMP_SALLOC_LIMBS (n + 1);

 -  as2  = TMP_SALLOC_LIMBS (n + 1);

 -  ash  = TMP_SALLOC_LIMBS (n + 1);

 -  asmh = TMP_SALLOC_LIMBS (n + 1);

 -

 -  bs1  = TMP_SALLOC_LIMBS (n + 1);

 -  bsm1 = TMP_SALLOC_LIMBS (n + 1);

 -  bs2  = TMP_SALLOC_LIMBS (n + 1);

 -  bsh  = TMP_SALLOC_LIMBS (n + 1);

 -  bsmh = TMP_SALLOC_LIMBS (n + 1);

 +  as1  = TMP_ALLOC_LIMBS (10 * n + 10);

 +  asm1 = as1  + n + 1;

 +  as2  = asm1 + n + 1;

 +  ash  = as2  + n + 1;

 +  asmh = ash  + n + 1;

 +  bs1  = asmh + n + 1;

 +  bsm1 = bs1  + n + 1;

 +  bs2  = bsm1 + n + 1;

 +  bsh  = bs2  + n + 1;

 +  bsmh = bsh  + n + 1;

    gp = pp;

    hp = pp + n + 1;