Fix rpc style in compiler_args check. #4730
Merged
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Problem
While trying to test the pants build in source repo I realizes that the compiler_args_has_rpc_style is broken because the compiler args will have double dash in front e.g. --finagle whereas values in _RPC_STYLES don't. This results in scrooge generation failing if both compiler_args and rpc_style specify rpc style.
Solution
Fixed the check.
Result
Setting compiler args to --finagle in java_thrift_libraries pants targets now succeeds even if rpc_style is defined.