hg: build-infra/jdk7: And now the optimization actually works. Had to add another awk

[erik.joelsson at oracle.com]

Changeset: 88f8ba374b6d
Author:    erikj
Date:      2011-10-25 12:32 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk7/rev/88f8ba374b6d

And now the optimization actually works. Had to add another awk
invokation. Maybe the number of invokations can be trimmed down. At
least should be better than before.

! common/make/JavaCompilation.gmk