Shawn Pearce daa1977489 Fix BuckPrologCompiler to create Java 6 class files
Gerrit targets Java 6, not Java 7. If Buck is run under JDK 7
the javac compiler by default will assume -source 7 -target 7
and write incompatible class files.

Ensure the compiler builds for Java 6 language features and
Java 6 class format by passing the correct flags.

Change-Id: Ib2c013a6d1955d94b75cfd5d967d2f45ef4d5486
2013-05-16 15:35:31 -07:00
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