Changed TARGET_ARCH_VARIANT_CPU to TARGET_CPU_VARIANT as it changed in
4.3

Change-Id: Id0a10188d76bff0381f2a92ba21398c716738b47
tf300t: mischelp: add liblog to SHARED_LIBRARIES. Same patch as tf700t.

Change-Id: I592e9fecb3f3b325645632b1d720f0b0c05c32e4