PATCH_GET is no longer exported by bitbake.conf, so no longer needs
to be pruned from the glibc do_compile() environment.
(From OE-Core rev: 5865fdc103fb92007f00a238b925be43af1378f5)
Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>