SDK_HOST_ARCH will be x86 if we are doing 32-bit host multilib build,
in which HOST_ARCH is actually x86_64.
Bug: 13751317
Change-Id: I8b7893b10cc4d0e71076b3b3625ec2f352aa8602
Because we need those modules for only emulator builds.
If you mark them as "debug", you'll get them even if you are doing a
real device userdebug/eng build.
Instead, we should add their module names to the emulator product config
in build/target/product/emulator.mk.
Bug: 8276818
Change-Id: I58988ce49804583b06e7d93380c44ba800448216
