gcc-cross: Make gcc-cross-initial as the only intermediate gcc stage

gcc-cross: Make gcc-cross-initial as the only intermediate gcc stage

Now glibc can be compiled with gcc-cross-initial therefore prepare
the stage to drop gcc-cross-intermediate

Also drop arm-nolibfloat.patch should not be needed anymore
half of changes in this patch are meant for OABI which we dont
use anymore

Signed-off-by: Khem Raj <raj.khem@gmail.com>