Re-apply androidfw fixes lost by the directory rearrangement.

Assignment to wrong variable in libs/androidfw/AssetManager.cpp.
https://code.google.com/p/android/issues/detail?id=61560

Missing delete[]s in libs/androidfw/ObbFile.cpp.
https://code.google.com/p/android/issues/detail?id=61549

Change-Id: I24e6867284d70a7793d78e62d1a836cbee310fb0
diff --git a/libs/androidfw/ObbFile.cpp b/libs/androidfw/ObbFile.cpp
index 21e06c8..ec59f06 100644
--- a/libs/androidfw/ObbFile.cpp
+++ b/libs/androidfw/ObbFile.cpp
@@ -133,7 +133,7 @@
     {
         lseek64(fd, fileLength - kFooterTagSize, SEEK_SET);
 
-        char *footer = new char[kFooterTagSize];
+        char footer[kFooterTagSize];
         actual = TEMP_FAILURE_RETRY(read(fd, footer, kFooterTagSize));
         if (actual != kFooterTagSize) {
             ALOGW("couldn't read footer signature: %s\n", strerror(errno));