[mips] Removing __SIZEOF_INT128__ macro for MIPS64

This is a temporary workaround while MIPS64 has not yet fully supported
128-bit integers. But declaration of int128 type is necessary even though
`__SIZEOF_INT128__` is undefined because c++ standard header files like
`limits` throw error message if `__int128` is not available.

Patch by Sagar Thakur.

Differential Revision: http://reviews.llvm.org/D6402

llvm-svn: 223927
diff --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
index 43492f8..4f32114 100644
--- a/clang/test/Preprocessor/init.c
+++ b/clang/test/Preprocessor/init.c
@@ -3138,6 +3138,7 @@
 // MIPS64BE:#define __SIG_ATOMIC_WIDTH__ 32
 // MIPS64BE:#define __SIZEOF_DOUBLE__ 8
 // MIPS64BE:#define __SIZEOF_FLOAT__ 4
+// MIPS64BE-NOT:#define __SIZEOF_INT128__ 16
 // MIPS64BE:#define __SIZEOF_INT__ 4
 // MIPS64BE:#define __SIZEOF_LONG_DOUBLE__ 16
 // MIPS64BE:#define __SIZEOF_LONG_LONG__ 8
@@ -3345,6 +3346,7 @@
 // MIPS64EL:#define __SIG_ATOMIC_WIDTH__ 32
 // MIPS64EL:#define __SIZEOF_DOUBLE__ 8
 // MIPS64EL:#define __SIZEOF_FLOAT__ 4
+// MIPS64EL-NOT:#define __SIZEOF_INT128__ 16
 // MIPS64EL:#define __SIZEOF_INT__ 4
 // MIPS64EL:#define __SIZEOF_LONG_DOUBLE__ 16
 // MIPS64EL:#define __SIZEOF_LONG_LONG__ 8