Track removal of refcounts from FileMap.

Use delete instead of release.

Change-Id: I25c841b368aa9d51e9259399b94cafa2bbb7a076
diff --git a/libs/androidfw/Asset.cpp b/libs/androidfw/Asset.cpp
index 4b3382e..782806e 100644
--- a/libs/androidfw/Asset.cpp
+++ b/libs/androidfw/Asset.cpp
@@ -532,7 +532,7 @@
 void _FileAsset::close(void)
 {
     if (mMap != NULL) {
-        mMap->release();
+        delete mMap;
         mMap = NULL;
     }
     if (mBuf != NULL) {
@@ -612,7 +612,7 @@
 
         map = new FileMap;
         if (!map->create(NULL, fileno(mFp), mStart, mLength, true)) {
-            map->release();
+            delete map;
             return NULL;
         }
 
@@ -827,7 +827,7 @@
 void _CompressedAsset::close(void)
 {
     if (mMap != NULL) {
-        mMap->release();
+        delete mMap;
         mMap = NULL;
     }