ANDROID: HACK: firmware, LLVMLinux: fix EFI libstub with clang

Without any extra guidance, clang will generate libstub with either
absolute or relative ELF relocations.  Use the right combination of
-fpic and -fno-pic on different files to avoid this.

Change-Id: I59b052a14c8cda88fc4c3ba8bdb26c456f9316ef
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Git-commit: 90387ea45956dd9f61d43babe2b3329ffe58037e
Git-repo: https://android.googlesource.com/kernel/common/


[satyap@codeaurora.org: trivial merge conflict resolution]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>