improved missing-step warnings to indicate how steps are searched for

Former-commit-id: 3e4d093a69f251dbb67305d0b085df03c9beaeeb

tools/ps_analyze.sh

@@ -625,6 +625,8 @@ check_steps_completed()
 				echo "*********************************************************"
 				echo "*********************************************************"
 				echo "  Warning! Step requested, but not performed: $step_name "
+				echo "  (Could not find ${step_name}.exe nor lib${step_name}.so"
+				echo "  in include path: $SECURITY_TRANSFORMS_HOME/plugins_install/)"
 				echo "*********************************************************"
 				echo "*********************************************************"
 				warnings=1
@@ -902,6 +904,8 @@ do_plugins()
 			echo "*********************************************************"
 			echo "*********************************************************"
 			echo "  Warning! Step requested, but not performed: $stepname "
+			echo "  (Could not find ${stepname}.exe nor lib${stepname}.so "
+			echo "  in include path: $SECURITY_TRANSFORMS_HOME/plugins_install/)"
 			echo "*********************************************************"
 			echo "*********************************************************"
 			warnings=1