pre-commit: Improve error message if not in a workon

Change-Id: Id9df3bfa7d5cafb3a096ea02c2984e155901a457
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/42027
Reviewed-by: Matt K. Light <mklight@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>

src/tools/hooks/pre-commit

@@ -6,7 +6,7 @@
 #
 # OpenPOWER sbe Project
 #
-# Contributors Listed Below - COPYRIGHT 2016
+# Contributors Listed Below - COPYRIGHT 2016,2017
 # [+] International Business Machines Corp.
 #
 #
@@ -34,6 +34,8 @@ if [ -f $TOOLSDIR/pre-commit-actions ]; then
 elif [ -f $TOOLSDIR/pre-commit-prologs ]; then
     $TOOLSDIR/pre-commit-prologs
 else
-    echo "Missing pre-commit files"
+    echo "Error: environment not setup properly..."
+    echo "Run 'source env.bash' or './sb workon' based on your current environment"
+    echo "For more info run './sb --help'"
     exit -1
 fi