Print a summary of what the create command did

Added an echo to print "Created 1.2.3RC4 on branch release-1.2.3." when
`release.sh create` runs, to save people from the mistake I made (pushing the
first RC as "RC3").

I also added a line to bounce the shell back to the original branch the user
was on, since it's a bit weird to have the script exit and be on a different
branch.

--
MOS_MIGRATED_REVID=137512849
diff --git a/scripts/release/release.sh b/scripts/release/release.sh
index e72d563..76587e9 100755
--- a/scripts/release/release.sh
+++ b/scripts/release/release.sh
@@ -49,7 +49,12 @@
   git notes --ref=release remove 2>/dev/null || true
   git notes --ref=release-candidate remove 2>/dev/null || true
   git notes --ref=release append -m "$1"
-  [ -z "${2-}" ] || git notes --ref=release-candidate append -m "$2"
+  local relname="$1"
+  if [[ ! -z "${2-}" ]]; then
+    git notes --ref=release-candidate append -m "$2"
+    relname="${relname}RC${2}"
+  fi
+  echo "$relname"
 }
 
 # Trim empty lines at the beginning and the end of the buffer.
@@ -187,10 +192,11 @@
   release_note_editor ${tmpfile} "${origin_branch}" "${branch_name}"
   local relnotes="$(cat ${tmpfile})"
 
-  echo "Creating the release commit"
   create_release_commit "${release_title}" "${release_name}" \
       "${relnotes}" "${tmpfile}" "${baseline}" $@
-  set_release_name "${release_name}" "${rc}"
+  release_name=$(set_release_name "${release_name}" "${rc}")
+  git checkout ${origin_branch} &> /dev/null
+  echo "Created ${release_name} on branch ${branch_name}."
 
   rm -f ${tmpfile} ${tmpfile2}
   trap - EXIT