commit 0daa78eef4b3cfc32833b335e396f3b916038dea
author Isaac Chen <ycchen@google.com> Tue Jun 27 12:14:42 2017 +0800
committer Isaac Chen <ycchen@google.com> Thu Aug 10 16:13:22 2017 +0800
tree 7e47e62894e7ac78251dc01535fb22d5f75ead9a
parent 577ff4730fdc1c2caf27a485106e31e04d61893f

Build support for 32-bit armv8-a

Overwrite TARGET_(2ND_)ARCH_VARIANT as armv8-a if
TARGET_(2ND_)CPU_VARIANT is set to some known armv8-a core like
cortex-a53, cortex-a73, kryo, denver64 etc.

For clang, -march is ignored if -mcpu is set to specific core so this
change doen't impact the objects built for armv7-a-neon/some_armv8_core
since it's treated as armv8-a/some_armv8_core.

Bug: 62895439
Test: Built modified aosp_arm64 with armv8-a as its TARGET_2ND_CPU_ARCH
      and generic as its TARGET_2ND_CPU_VARIANT successfully.
      "lunch hikey-userdebug; make" and verify TARGET_2ND_ARCH_VARIANT
      is overwritten.

Change-Id: If4260cf397783b5f56c4fd432615f4676429a1d3