GenSpecialCase support for x86

Moved GenSpecialCase from being ARM specific to common code to allow
it to be used by x86 quick as well.

Change-Id: I728733e8f4c4da99af6091ef77e5c76ae0fee850
Signed-off-by: Razvan A Lupusoru <razvan.a.lupusoru@intel.com>
diff --git a/compiler/dex/quick/mips/call_mips.cc b/compiler/dex/quick/mips/call_mips.cc
index 2e385a3..a663519 100644
--- a/compiler/dex/quick/mips/call_mips.cc
+++ b/compiler/dex/quick/mips/call_mips.cc
@@ -23,9 +23,10 @@
 
 namespace art {
 
-void MipsMir2Lir::GenSpecialCase(BasicBlock* bb, MIR* mir,
+bool MipsMir2Lir::GenSpecialCase(BasicBlock* bb, MIR* mir,
                                  const InlineMethod& special) {
-    // TODO
+  // TODO
+  return false;
 }
 
 /*
@@ -345,4 +346,8 @@
   OpReg(kOpBx, r_RA);
 }
 
+void MipsMir2Lir::GenSpecialExitSequence() {
+  OpReg(kOpBx, r_RA);
+}
+
 }  // namespace art