Make the javac arguments match what is used by make, and export them
back to make. A future change will switch make to use the the
exported ones.
This makes a dx.jar compiled with soong have identical class files
as one compiled with make.
Test: manual
Change-Id: Ia5196f1f42bc564e99de22e32e72fd2930e9fbae
When the UseGoma flag is set, put all rules except the C compilation
rule in an externally defined local_pool, which will have been created
by kati. The gomacc wrapper will already be in the CC_WRAPPER
environment variable.
Bug: 31142427
Change-Id: I699d4edff2e302eee398dad8692ceb14721a628c