rumme: Handle missing tools in TOOL_PATH gracefully

Suppress errors and ensure script continuation when tools are absent in TOOL_PATH assignment

runme.sh

@@ -194,7 +194,7 @@ echo "Checking all required tools are installed"
 
 set +e
 for i in $TOOLS; do
-	TOOL_PATH=`which $i`
+	TOOL_PATH=$(which $i 2>/dev/null) || true
 	if [ "x$TOOL_PATH" == "x" ]; then
 		echo "Tool $i is not installed"
 		echo "If running under apt based package management you can run -"