Portable refactorings.

Separate quick from portable entrypoints.
Move architectural dependencies into arch.

Change-Id: I9adbc0a9782e2959fdc3308215f01e3107632b7c
diff --git a/compiler/utils/x86/assembler_x86.cc b/compiler/utils/x86/assembler_x86.cc
index 89bfeb5..9095180 100644
--- a/compiler/utils/x86/assembler_x86.cc
+++ b/compiler/utils/x86/assembler_x86.cc
@@ -1837,7 +1837,7 @@
   }
   // Pass exception as argument in EAX
   __ fs()->movl(EAX, Address::Absolute(Thread::ExceptionOffset()));
-  __ fs()->call(Address::Absolute(ENTRYPOINT_OFFSET(pDeliverException)));
+  __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(pDeliverException)));
   // this call should never return
   __ int3();
 #undef __