ART: Adds an entrypoint for invoke-custom

Add support for the compiler to call into the runtime for
invoke-custom bytecodes.

Bug: 35337872
Test: art/test.py --host -r -t 952
Test: art/test.py --target --64 -r -t 952
Test: art/test.py --target --32 -r -t 952
Change-Id: I821432e7e5248c91b8e1d36c3112974c34171803
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index a340446..b3c29aa 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -542,10 +542,13 @@
 
   void GenerateInvokeStaticOrDirectRuntimeCall(
       HInvokeStaticOrDirect* invoke, Location temp, SlowPathCode* slow_path);
+
   void GenerateInvokeUnresolvedRuntimeCall(HInvokeUnresolved* invoke);
 
   void GenerateInvokePolymorphicCall(HInvokePolymorphic* invoke);
 
+  void GenerateInvokeCustomCall(HInvokeCustom* invoke);
+
   void CreateUnresolvedFieldLocationSummary(
       HInstruction* field_access,
       DataType::Type field_type,