Add runtime support for method based compilation.

Enhanced code cache management to accommodate both trace and method
compilations. Also implemented a hacky dispatch routine for virtual
leaf methods.

Microbenchmark showed 3x speedup in leaf method invocation.

Change-Id: I79d95b7300ba993667b3aa221c1df9c7b0583521
diff --git a/vm/compiler/Compiler.c b/vm/compiler/Compiler.c
index a1e3d0e..6cd7eb5 100644
--- a/vm/compiler/Compiler.c
+++ b/vm/compiler/Compiler.c
@@ -644,6 +644,7 @@
                                 work.result.codeAddress) {
                             dvmJitSetCodeAddr(work.pc, work.result.codeAddress,
                                               work.result.instructionSet,
+                                              false, /* not method entry */
                                               work.result.profileCodeSize);
                         }
                     }