Staticify.

Mark some functions "static".

Change-Id: Ia80bccab1f72690729e43f99783d34fe366108b2
diff --git a/vm/compiler/codegen/arm/RallocUtil.c b/vm/compiler/codegen/arm/RallocUtil.c
index e917995..ff5d16b 100644
--- a/vm/compiler/codegen/arm/RallocUtil.c
+++ b/vm/compiler/codegen/arm/RallocUtil.c
@@ -710,7 +710,7 @@
           info->inUse = true;
 }
 
-void copyRegInfo(CompilationUnit *cUnit, int newReg, int oldReg)
+static void copyRegInfo(CompilationUnit *cUnit, int newReg, int oldReg)
 {
     RegisterInfo *newInfo = getRegInfo(cUnit, newReg);
     RegisterInfo *oldInfo = getRegInfo(cUnit, oldReg);