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/cpio/mkbootfs.c b/cpio/mkbootfs.c
index 3569e27..7d3740c 100644
--- a/cpio/mkbootfs.c
+++ b/cpio/mkbootfs.c
@@ -220,6 +220,8 @@
         free(names[i]);
     }
     free(names);
+
+    closedir(d);
 }
 
 static void _archive(char *in, char *out, int ilen, int olen)