Set TARGET_2ND_(CPU|ARCH)_VARIANT properly

Dragon uses ARM Cortex-A53, so 2nd arch/cpu variant should be:

	TARGET_2ND_ARCH_VARIANT := armv8-a
	TARGET_2ND_CPU_VARIANT := cortex-a53

instead of armv7-a-neon/cortex-a7 since 32-bit armv8
support is ready in AOSP.

Without this change, vendor bits will encounter build failure
since some components still use gcc, which complains armv7-a
conflicts cortex-a7 (technically, an armv7ve implementation).

Test: lunch aosp_dragon; make -j
Change-Id: I7dffa6c4e4b27b9a429a4b2ddc1ac99444dc9cfa
1 file changed