Move third_party code under third_party/src so it can be used in $GOPATH.

hack/config-go.sh

@@ -53,7 +53,7 @@ KUBE_GO_PACKAGE_DIR="${GOPATH}/src/${KUBE_GO_PACKAGE}"
     fi
 
     rm "${PACKAGE_DIR}" >/dev/null 2>&1 || true
-    ln -s "${THIRD_PARTY_BASE}/${p}" "${PACKAGE_DIR}"
+    ln -s "${THIRD_PARTY_BASE}/src/${p}" "${PACKAGE_DIR}"
   done
 
   for p in ${PACKAGES}; do

hooks/prepare-commit-msg

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 errors=0
-for file in $(git diff --cached --name-only | grep "\.go"); do
+for file in $(git diff --cached --name-only --diff-filter ACM | grep "\.go" | grep -v "third_party"); do
   diff="$(git show ":${file}" | gofmt -s -d)"
   if [[ -n "$diff" ]]; then
     echo "# *** ERROR: *** File ${file} has not been gofmt'd." >> $1

release/release.sh

@@ -40,7 +40,7 @@ mkdir -p $MASTER_RELEASE_DIR/third_party/go
 echo "Building release tree"
 cp release/master-release-install.sh $MASTER_RELEASE_DIR/src/scripts/master-release-install.sh
 cp -r cluster/saltbase $MASTER_RELEASE_DIR/src/saltbase
-cp -r third_party $MASTER_RELEASE_DIR/third_party/go/src
+cp -r third_party/src $MASTER_RELEASE_DIR/third_party/go/src
 
 function find_go_files() {
   find * -not \( \