Atomic op cleanup.

Replaced VM-local macros for barrier and CAS calls with the actual
versions provided by cutils.

 ATOMIC_CMP_SWAP(addr,old,new) --> android_atomic_release_cas(old,new,addr)

 MEM_BARRIER --> ANDROID_MEMBAR_FULL

Renamed android_quasiatomic* to dvmQuasiAtomic*.

Didn't change how anything works, just the names.

Change-Id: I8c68f28e1f7c9cb832183e0918d097dfe6a2cac8
diff --git a/vm/oo/Class.c b/vm/oo/Class.c
index db0ce7b..16cba12 100644
--- a/vm/oo/Class.c
+++ b/vm/oo/Class.c
@@ -1129,7 +1129,8 @@
     do {
         oldValue = gDvm.classSerialNumber;
         newValue = oldValue + 1;
-    } while (!ATOMIC_CMP_SWAP(&gDvm.classSerialNumber, oldValue, newValue));
+    } while (android_atomic_release_cas(oldValue, newValue,
+            &gDvm.classSerialNumber) != 0);
 
     clazz->serialNumber = (u4) oldValue;
 }