Enable JIT parameters to be initialized in an architecture dependent way.

The search for optimial value is still ongoing. The current settings are:

                         v5    v7
JIT profile table       512  2048
JIT code cache         512K    1M
JIT threshold           200    40
diff --git a/vm/compiler/Compiler.c b/vm/compiler/Compiler.c
index 2fafd4e..1d52198 100644
--- a/vm/compiler/Compiler.c
+++ b/vm/compiler/Compiler.c
@@ -126,7 +126,7 @@
     extern void dmvCompilerTemplateEnd(void);
 
     /* Allocate the code cache */
-    gDvmJit.codeCache = mmap(0, CODE_CACHE_SIZE,
+    gDvmJit.codeCache = mmap(0, gDvmJit.codeCacheSize,
                           PROT_READ | PROT_WRITE | PROT_EXEC,
                           MAP_PRIVATE | MAP_ANON, -1, 0);
     if (gDvmJit.codeCache == MAP_FAILED) {