hg: build-infra/jdk8: Change from awk to nawk in IdlCompilation.gmk to deal with long path strings. Reference JDK-8006903 and JDK-8006933

[tim.bell at oracle.com]

Changeset: 5c22313a4574
Author:    tbell
Date:      2013-01-25 01:45 -0800
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/5c22313a4574

Change from awk to nawk in IdlCompilation.gmk to deal with long path strings.  Reference JDK-8006903 and JDK-8006933

! common/makefiles/IdlCompilation.gmk