Use arm instruction set with clang 7.0 LTO

* surfaceflinger.so uses LTO.
  clang 7.0 LTO inlined more code and some references
  are too far away to use thumb instructions.

Bug: 72619014
Test: build with Forrest
Merged-In: Ia09931e93a170ac58007f80da2d580bb9b9635a6
Change-Id: I2cbb652a9a8d908d9444a267e6d234b135c279b5
9 files changed