Add -fPIC as default Clang mips ASFLAGS.

For mips target, gcc passes -KPIC to assembler by default,
but clang passes -KPIC only if -fPIC or -fpic is given.

BUG: 17895505
Change-Id: I7803adaf8ad7b40c6473872b67f4e0b4c502b38a
diff --git a/core/clang/TARGET_mips.mk b/core/clang/TARGET_mips.mk
index 91067f5..b7e40e3 100644
--- a/core/clang/TARGET_mips.mk
+++ b/core/clang/TARGET_mips.mk
@@ -9,6 +9,7 @@
   $(CLANG_CONFIG_EXTRA_ASFLAGS) \
   $(CLANG_CONFIG_TARGET_EXTRA_ASFLAGS) \
   $(CLANG_CONFIG_mips_EXTRA_ASFLAGS) \
+  -fPIC \
   -target $(CLANG_CONFIG_mips_TARGET_TRIPLE) \
   -B$(CLANG_CONFIG_mips_TARGET_TOOLCHAIN_PREFIX)