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/file_sync_service.c b/file_sync_service.c
index d3e841b..f24f14c 100644
--- a/file_sync_service.c
+++ b/file_sync_service.c
@@ -110,6 +110,7 @@
 
             if(writex(s, &msg.dent, sizeof(msg.dent)) ||
                writex(s, de->d_name, len)) {
+                closedir(d);
                 return -1;
             }
         }