configure: generic instructions for missing python modules

Instead of telling the user what packages to install for missing
Python modules, give generic instructions about what module
needs to be installed.

It is getting tricky to get these package names correct
across distributions.

configure.ac

@@ -145,7 +145,8 @@
        echo "    Warning: Python distutils not found. Python tools will"
        echo "        not be installed."
        echo ""
-       echo "    Please install the distutils module for Python ${pymv}."
+       echo "    Install the distutils module for Python ${pymv} to enable"
+       echo "    the Python tools."
        echo ""
     fi
 
@@ -1523,11 +1524,10 @@
         if test "$have_python_yaml" != "yes"; then
 	    echo ""
 	    echo "    Warning: suricata-update will not be installed as the"
-	    echo "        depedency python-yaml is not installed."
+	    echo "        Python yaml module is not installed.."
 	    echo ""
-	    echo "    Debian/Ubuntu: apt install python-yaml"
+            echo "    Install the yaml module for Python ${pymv} to enable"
-	    echo "    Fedora: dnf install python-yaml"
+            echo "    suricata-update."
-	    echo "    CentOS/RHEL: yum install python-yaml"
 	    echo
 	else
             SURICATA_UPDATE_DIR="suricata-update"