android: intel: Flatten the makefile structure

Android porting of commit bebc1a1 "intel: Flatten the makefile structure"

Automake approach was followed, by moving makefiles a level up,
naming them Android.genxml.mk and Android.isl.mk,
performing the necessary adjustments to the paths,
adding src/intel/Android.mk and fixing mesa top level makefile.

Acked-by: Jason Ekstrand <jason@jlekstrand.net>
4 files changed