bin/deps-and-gyp: deal with corner cases cleanly

bin/deps-and-gyp

 #!/bin/sh
 
 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script will update Skia's dependenciess as necessary and run
 # gyp if needed.
 
@@ skipping 16 matching lines @@
     SKIA_OUT="$(cd "$SKIA_OUT"; pwd)"
 fi
 
 cd "$(dirname "$0")/.."
 
 if ! [ -f DEPS ]; then
     echo DEPS file missing >&2
     exit 1
 fi
 
-if [ "$(git hash-object DEPS)" != "$(git config sync-deps.last)" ] ; then
-    GIT_SYNC_DEPS_QUIET=1 python tools/git-sync-deps || exit
-    git config sync-deps.last "$(git hash-object DEPS)"
-fi
+GIT_SYNC_DEPS_QUIET=1 python tools/git-sync-deps || exit
 
 catifexists() { if [ -f "$1" ]; then cat "$1"; fi; }
 
 gyp_hasher() {
     {
         echo "$CC"
         echo "$CXX"
         echo "$GYP_GENERATORS"
         echo "$GYP_DEFINES"
         find gyp -type f -print -exec git hash-object {} \;
         find bench gm tests -name '*.c*' | LANG= sort
     } | git hash-object --stdin
 }
 
 : ${SKIA_OUT:=out}
 GYP_HASH=$(gyp_hasher)
 HASH_PATH="${SKIA_OUT}/gyp_hash"
 if [ "$GYP_HASH" != "$(catifexists "$HASH_PATH")" ]; then
     python ./gyp_skia || exit
     echo "$GYP_HASH" > "$HASH_PATH"
 fi