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/fastboot/fastboot.c b/fastboot/fastboot.c
index 70b838f..da2af41 100644
--- a/fastboot/fastboot.c
+++ b/fastboot/fastboot.c
@@ -449,7 +449,13 @@
 
     for(n = 0; n < count; n++) {
         out[n] = strdup(strip(val[n]));
-        if (out[n] == 0) return -1;
+        if (out[n] == 0) {
+            for(size_t i = 0; i < n; ++i) {
+                free((char*) out[i]);
+            }
+            free(out);
+            return -1;
+        }
     }
 
     fb_queue_require(prod, name, invert, n, out);