Update commons-compress to 1.6

Update commons-compress to 1.6

Includes various fixes, including
  o Writing TAR PAX headers failed if the generated entry name ended
    with a "/".
    Issue: COMPRESS-203.
which has been happening in the wild (java.io.IOException: request to
write '120' bytes exceeds size in header of '0' bytes for entry
'./PaxHeaders.X/hostsidetests/appsecurity/test-apps/AppAccessData/[...]/').

TODO: update orbit repository URL when new Orbit R-build is available,
see bug 425660

Change-Id: I92a87543a6ace9a06a70a29534399608cee6adb1
Signed-off-by: Jonathan Nieder <jrn@google.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>