Use full pass name when building optimizations

If possible, use full pass name provided in --run-passes rather
than its base version.

Test: m test-art-host -j32

1. Prepare a run-passes file with content:
dead_code_elimination$initial
instruction_simplifier
x86_memory_operand_generation
2. Run art for a dex file like:
art -Xcompiler-option --run-passes=run-passes -Xcompiler-option
--dump-passes -classpath classes.dex Test
3. Verify that dead_code_elimination$initial string is present in
dump-passes output.

Change-Id: I92d9ed0c8b919ea03f625f549123f546dffe546b