scripts: always create lib32 and lib64 symlinks

Unconditionally create the lib32 -> lib/ and lib64 -> lib/ symlinks.

This is reportedly a fix to build a toolchain for a 32-bit target on
a 'pure' 64-bit host (eg. on Fedora FC12, host libs are in lib64/,
and there is no lib -> lib64 symlink, as we can see on other distors,
as Debian). As gcc only puts static host lib in lib64/ (along with
target files in subdirs), we can safely create the symlinks.

Also note that the symlinks are summarily removed at the end
of the build.

Signed-off-by: Anthony Foiani <anthony.foiani@gmail.com>
[Yann E. MORIN: fix a comment, rephrase the commit log]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

timezone data has been split into the package sys-libs/timezone-data

diff -durN glibc-2.10.1.orig/Makeconfig glibc-2.10.1/Makeconfig

--- glibc-2.10.1.orig/Makeconfig	2009-11-13 00:50:13.000000000 +0100

+++ glibc-2.10.1/Makeconfig	2009-11-13 00:50:41.000000000 +0100

@@ -919,7 +919,7 @@

 	      stdlib stdio-common libio malloc string wcsmbs time dirent    \

 	      grp pwd posix io termios resource misc socket sysvipc gmon    \

 	      gnulib iconv iconvdata wctype manual shadow gshadow po argp   \

-	      crypt nss localedata timezone rt conform debug		    \

+	      crypt nss localedata rt conform debug		    \

 	      $(add-on-subdirs) $(dlfcn) $(binfmt-subdir)

 ifndef avoid-generated