Code commit for 'make -f' support, breaks the build in cases where
entries in $(MAKEFILE_LIST) are absolute paths. This commit uses
notdir and firstword to ensure that only the local filename is used.
Fixes: 3a5c339d51a4 ("mk: support renamed Makefile in external project")
Cc: stable@dpdk.org
Signed-off-by: Marko Kovacevic <marko.kovacevic@intel.com>
c36fddd437