util/release/build-release: Use short git hash for .coreboot-version

Builds were suddenly failing when the release was done, because the
coreboot version was overflowing a 64 character limit.  We don't need
or use the full hash in other places, so limit the hash to just what's
needed to identify the commit.

Change-Id: I57c535ca251792cae2c9a9c951e6b44bb61e4e78
Signed-off-by: Martin Roth <martin@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64923
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/util/release/build-release b/util/release/build-release
index 95eead6..d4a9a1f5 100755
--- a/util/release/build-release
+++ b/util/release/build-release
@@ -66,7 +66,7 @@
 	git tag -a --force "$VERSION_NAME" -m "coreboot version $VERSION_NAME"
 fi
 
-printf "%s-%s\n" "$VERSION_NAME"  "$(git log --pretty=%H|head -1)" > .coreboot-version
+printf "%s-%s\n" "$VERSION_NAME"  "$(git log --pretty=%h|head -1)" > .coreboot-version
 tstamp=$(git log --pretty=format:%ci -1)
 cd ..
 
@@ -75,6 +75,7 @@
 exclude_paths+="3rdparty/intel-microcode "
 exclude_paths+="3rdparty/amd_blobs "
 exclude_paths+="3rdparty/qc_blobs "
+
 for i in ${exclude_paths}; do
 	blobs_paths+="coreboot-${VERSION_NAME}/${i} "
 	exclude_opts+="--exclude=coreboot-${VERSION_NAME}/${i} "