Stamp out some x86/host mode warnings

Nuked a void* cast warnings and moved cacheflush into a target-specific
utility wrapper.

Change-Id: I36c841288b9ec7e03c0cb29b2e89db344f36fad1
diff --git a/vm/compiler/CompilerUtility.h b/vm/compiler/CompilerUtility.h
index d3f2d6a..3e65a2e 100644
--- a/vm/compiler/CompilerUtility.h
+++ b/vm/compiler/CompilerUtility.h
@@ -73,5 +73,7 @@
 void dvmDumpBlockBitVector(const GrowableList *blocks, char *msg,
                            const BitVector *bv, int length);
 void dvmGetBlockName(struct BasicBlock *bb, char *name);
+int dvmCompilerCacheFlush(long start, long end, long flags);
+
 
 #endif /* _DALVIK_COMPILER_UTILITY */