openjdk-7: Fix QA errors non debug package contains .debug directory

Fixes errors like below when building jamvm as additional VM

ERROR: QA Issue: non debug package contains .debug directory:
openjdk-7-common path
/work/ppce500v2-poky-linux-gnuspe/openjdk-7-jre/03b21-2.1.7-r6.0/packages-split/openjdk-7-common/usr/lib/jvm/java-7-openjdk/jre/lib/ppc/client/.debug/libjvm.so
ERROR: QA run found fatal errors. Please consider fixing them.
ERROR: Function failed: do_package_qa

Signed-off-by: Khem Raj <raj.khem@gmail.com>