Revert "Revert "Merge remote-tracking branch 'cm/cm-10.2' into jb4.3""

This reverts commit d7298a9d6dfb017a723e75976c1f06d0e3efd464.
Revert "Revert "Merge remote-tracking branch 'cm/cm-10.2' into jb4.3""

This reverts commit f7f5919baaab1635fbc81abc0a9c1f9e31ffbd8e.
makefile: arm: optimize for a15 not a9