Fix a bunch of small system/core bugs.

Missing frees in:
  adb/file_sync_client.c
  fastboot/fastboot.c
  libsparse/output_file.c

Missing closedirs in:
  adb/file_sync_service.c
  cpio/mkbootfs.c
  libcutils/dir_hash.c

Potential buffer overrun in:
  gpttool/gpttool.c

Incorrect NULL check in:
  libsparse/backed_block.c

Bug: https://code.google.com/p/android/issues/detail?id=61564
Change-Id: If97838a9e73a77aef7f416c31c237ce1fca4ce21
diff --git a/libcutils/dir_hash.c b/libcutils/dir_hash.c
index be14af6..098b5db 100644
--- a/libcutils/dir_hash.c
+++ b/libcutils/dir_hash.c
@@ -159,6 +159,7 @@
 
             free(name);
             free(node);
+            closedir(d);
             return -1;
         }