utils: fix warnings for unused parameters

Change-Id: Ibfb755a30ba2923669060fe0aed019beecbe38a1
diff --git a/include/utils/RWLock.h b/include/utils/RWLock.h
index a5abea2..90beb5f 100644
--- a/include/utils/RWLock.h
+++ b/include/utils/RWLock.h
@@ -84,10 +84,10 @@
 inline RWLock::RWLock() {
     pthread_rwlock_init(&mRWLock, NULL);
 }
-inline RWLock::RWLock(const char* name) {
+inline RWLock::RWLock(__attribute__((unused)) const char* name) {
     pthread_rwlock_init(&mRWLock, NULL);
 }
-inline RWLock::RWLock(int type, const char* name) {
+inline RWLock::RWLock(int type, __attribute__((unused)) const char* name) {
     if (type == SHARED) {
         pthread_rwlockattr_t attr;
         pthread_rwlockattr_init(&attr);