Log only status of selected git repositories

Take a look at COMPONENTS setting. This way single-component build log
is not trashed with a status of all the repositories.

QubesOS/qubes-issues#2023

scripts/log-git-status

@@ -28,7 +28,7 @@ git status --porcelain -uall $ignore_args --ignore-submodules=all
 git status -z -uall $ignore_args --ignore-submodules=all | sed -zn 'h; /^R/n; g; s/^...//; p' | xargs -r0 sha512sum
 
 if [ -z "$repo" ]; then
-    for d in qubes-src/*/; do
+    for d in $(make get-var GET_VAR=GIT_REPOS); do
         $script_path $d
     done
 else