We have to use an 'objdir' directory for building glibc and make its
name unique by appending $arch_target to distinguish while building
a multilib capable glibc using buildloops.
- Since we build 32bit libs of glibc by using a second buildloop
if we build a multilib target, we have to assure that we build
64 and 32bit libs in separate directories.
Christian Wiese
Alejandro Mery