contrib: common: Record repo curr rev in have_repo instead of build_repo

This way scripts making use only of have_repo (to have build specific
insturctions) can still benefit from that code.

Change-Id: I03149942ac1d279a15c71df3eb880c331c8fc155

contrib/jenkins-build-common.sh

@@ -91,6 +91,8 @@ have_repo() {
 
   git rev-parse HEAD
 
+  echo "$(git rev-parse HEAD) $dep" >> "$prefix_real/${name}_git_hashes.txt"
+
   cd "$base"
 }
 
@@ -122,8 +124,6 @@ build_repo() {
 
   cd "$dep"
 
-  echo "$(git rev-parse HEAD) $dep" >> "$prefix_real/${name}_git_hashes.txt"
-
   # special shim: we know the openbsc.git needs to be built in the openbsc/ subdir.
   if [ "$dep" = "openbsc" ]; then
     cd openbsc