Fix linux_install.sh script for OpenSuse v 15.1 (#6251)

util/linux_install.sh

@@ -118,7 +118,7 @@ elif grep ID /etc/os-release | grep -q sabayon; then
 elif grep ID /etc/os-release | grep -qE "opensuse|tumbleweed"; then
 	CROSS_AVR_GCC=cross-avr-gcc8
 	CROSS_ARM_GCC=cross-arm-none-gcc8
-	if grep ID /etc/os-release | grep -q "15.0"; then
+	if grep ID /etc/os-release | grep -q "15."; then
 		CROSS_AVR_GCC=cross-avr-gcc7
 		CROSS_ARM_GCC=cross-arm-none-gcc7
 	fi