util/dasharo/tag-with-changelog: try to reuse existing edk2 repository

If the script is run in the directory that was used to build coreboot,
chances are that edk2 repository is already cloned in the payloads
subdirectory. It is passed as '--reference-if-able' option, which
reduces the number of objects to be downloaded, even when it is checked
out on older revision. If that path doesn't exist, the repo gets cloned
as usual.

Upstream-Status: Inappropriate [Dasharo downstream]
Change-Id: I11eae8a7d87923a469ac7ba927103395ceb979f4
Signed-off-by: Krystian Hebel <krystian.hebel@3mdeb.com>

Author: krystian-hebel

util/dasharo/tag-with-changelog

@@ -438,7 +438,7 @@ if [ -z "$OLD_EDK2_GIT_VERSION" ]; then
 	OLD_EDK2_GIT_VERSION="$PREHISTORY"
 fi
 
-git clone "$URL" || version_ctrl_c
+git clone --reference-if-able payloads/external/edk2/workspace/Dasharo/ --bare "$URL" edk2 || version_ctrl_c
 get_log_submodule "$OLD_EDK2_GIT_VERSION" "$NEW_EDK2_GIT_VERSION" "edk2"
 rm -rf edk2