don't use LOCAL_*_arch for host builds

The LOCAL_*_$(TARGET_ARCH) variables don't make sense for host
modules, only append use them for target modules.

Also complete the list of LOCAL_*_arch and LOCAL_*_32/64 to be
consistent.

Change-Id: I00c83e5c4e08ed9a844f9f99a79ce4bcc3f0bf11
2 files changed