gnu-efi: fix parallel issue

gnu-efi: fix parallel issue

Fixed:
Assembler messages:
Fatal error: can't create runtime/rtlock.o: No such file or directory
Assembler messages:
Fatal error: can't create runtime/rtdata.o: No such file or directory
Assembler messages:
Fatal error: can't create runtime/vm.o: No such file or directory
Assembler messages:
Fatal error: can't create runtime/efirtlib.o: No such file or directory

(From OE-Core rev: 86d428775c95a900c9b452f03548b56cb980b64c)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>