Utilize common script when possible

To consolidate the bash scripts, the commonly used functions were moved
to the common script and all bash scripts should do 'source' before
performing.

Change-Id: Ic9a72b9a8d6fd4cd74b4e81a31d312a085a8426b

Author: jserv

scripts/checksums

@@ -1,3 +1,3 @@
 bff0704601c8197ae6b847647b4167664b7d6abc  queue.h
 b26e079496803ebe318174bda5850d2cce1fd0c1  list.h
-1029c2784b4cae3909190c64f53a06cba12ea38e  scripts/check-commitlog.sh
+1029c2784b4cae3909190c64f53a06cba12ea38e  scripts/check-commitlog.sh

scripts/install-git-hooks

@@ -52,6 +52,10 @@ fi
 ((CURRENT_STEP++))
 progress "$CURRENT_STEP" "$TOTAL_STEPS"
 
+# 3. Ensure this repository is frok from sysprog21/lab0-c'.
+((CURRENT_STEP++))
+progress "$CURRENT_STEP" "$TOTAL_STEPS"
+
 if [[ "${ACCOUNT}" != "sysprog21" ]]; then
   RESPONSE=$(${CURL} -s -H "Accept: application/vnd.github.v3+json" \
             "https://api.github.com/repos/${ACCOUNT}/lab0-c")