MIPS32: Saves 128-bit vector registers along SuspendCheckSlowPath

We need to save 128 bits of data. This is only done for vector
registers that are live, so overhead is not too big.

Test: mma test-art-host-gtest
Test: ./testrunner.py --optimizing --target in QEMU (MIPS)
Change-Id: I0f792e9c98011be3e24d5fad35a8244faafcb9a0
diff --git a/compiler/optimizing/code_generator_mips64.h b/compiler/optimizing/code_generator_mips64.h
index b620973..c94cc93 100644
--- a/compiler/optimizing/code_generator_mips64.h
+++ b/compiler/optimizing/code_generator_mips64.h
@@ -59,6 +59,8 @@
 
 class CodeGeneratorMIPS64;
 
+VectorRegister VectorRegisterFrom(Location location);
+
 class InvokeDexCallingConvention : public CallingConvention<GpuRegister, FpuRegister> {
  public:
   InvokeDexCallingConvention()