include LGPL projects in GPL archives

LGPL projects need their source code distributed under very
similar conditions to GPL and MPL, the only difference is the
conditions under which they may be linked. It makes sense to
include them in the GPL archive tarballs.

Change-Id: I2c2df03906bfeee55566102aa688e4cdc283700b
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>