Fix mips build for nested signal handler

Bug: 17006816

Change-Id: If41c6d7a2f12f1822ca36d9e2f0f22b3ca854098
diff --git a/runtime/arch/mips/fault_handler_mips.cc b/runtime/arch/mips/fault_handler_mips.cc
index 0e76aab..aa6d68a 100644
--- a/runtime/arch/mips/fault_handler_mips.cc
+++ b/runtime/arch/mips/fault_handler_mips.cc
@@ -29,6 +29,9 @@
 
 namespace art {
 
+void FaultManager::HandleNestedSignal(int sig, siginfo_t* info, void* context) {
+}
+
 void FaultManager::GetMethodAndReturnPcAndSp(siginfo_t* siginfo, void* context,
                                              mirror::ArtMethod** out_method,
                                              uintptr_t* out_return_pc, uintptr_t* out_sp) {