CI scripts: fix path to common.sh

Moving it to scripts/ci let that unchanged and that results in an error
in the CI system.

--
MOS_MIGRATED_REVID=100825881

scripts/ci/build.sh

diff --git a/scripts/ci/build.sh b/scripts/ci/build.sh
index 0a0f09d..4cb99e7 100755
--- a/scripts/ci/build.sh
+++ b/scripts/ci/build.sh
@@ -23,7 +23,7 @@
 
 # Load common.sh
 SCRIPT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
-source $(dirname ${SCRIPT_DIR})/scripts/release/common.sh
+source $(dirname ${SCRIPT_DIR})/release/common.sh
 
 : ${GIT_REPOSITORY_URL:=https://github.com/google/bazel}