scripts: hack-in lib32->lib symlinks

Some archs (eg. ppc64 with n32 ABI) will install their
variants in lib32/ instead of lib/, so do for lib32 as
we do for lib64->lib symlinks.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

 # m68k specific configuration file

 # depends on EXPERIMENTAL

 config ARCH_m68k

     select ARCH_SUPPORTS_32

     select ARCH_DEFAULT_32

     select ARCH_DEFAULT_BE

     select ARCH_SUPPORT_CPU

      help

       The m68k architecture