Mark lazily-patched native calls correctly as patchable.

runtime/vm/flow_graph_compiler_mips.cc

Index: runtime/vm/flow_graph_compiler_mips.cc
diff --git a/runtime/vm/flow_graph_compiler_mips.cc b/runtime/vm/flow_graph_compiler_mips.cc
index fe38b17e9adb0a3c11eaceb0ebf050a31aa7ac00..ef95a0ec6dad85170f04b59d2bee3b3d7ca20f34 100644
--- a/runtime/vm/flow_graph_compiler_mips.cc
+++ b/runtime/vm/flow_graph_compiler_mips.cc
@@ -1109,6 +1109,16 @@ void FlowGraphCompiler::GenerateCall(TokenPosition token_pos,
 }
 
 
+void FlowGraphCompiler::GeneratePatchableCall(TokenPosition token_pos,
+                                              const StubEntry& stub_entry,
+                                              RawPcDescriptors::Kind kind,
+                                              LocationSummary* locs) {
+  __ BranchLinkPatchable(stub_entry);
+  AddCurrentDescriptor(kind, Thread::kNoDeoptId, token_pos);
+  RecordSafepoint(locs);
+}
+
+
 void FlowGraphCompiler::GenerateDartCall(intptr_t deopt_id,
                                          TokenPosition token_pos,
                                          const StubEntry& stub_entry,