Added sqrt and pow for arm and x64 - to fix build failures.

src/arm/codegen-arm.cc

Index: src/arm/codegen-arm.cc
===================================================================
--- src/arm/codegen-arm.cc	(revision 4053)
+++ src/arm/codegen-arm.cc	(working copy)
@@ -3324,7 +3324,7 @@
 
 
 // Generates the Math.pow method - currently just calls runtime.
-void CodeGenerator::GeneratePow(ZoneList<Expression*>* args) {
+void CodeGenerator::GenerateMathPow(ZoneList<Expression*>* args) {
   ASSERT(args->length() == 2);
   Load(args->at(0));
   Load(args->at(1));
@@ -3332,6 +3332,16 @@
   frame_->EmitPush(r0);
 }
 
+
+// Generates the Math.sqrt method - currently just calls runtime.
+void CodeGenerator::GenerateMathSqrt(ZoneList<Expression*>* args) {
+  ASSERT(args->length() == 1);
+  Load(args->at(0));
+  frame_->CallRuntime(Runtime::kMath_sqrt, 1);
+  frame_->EmitPush(r0);
+}
+
+
 // This should generate code that performs a charCodeAt() call or returns
 // undefined in order to trigger the slow case, Runtime_StringCharCodeAt.
 // It is not yet implemented on ARM, so it always goes to the slow case.