Changed xz to gz

Makefile

 all: network-config qmi-service qmi-monitor-timer qmi-monitor-service
-	tar xf libqmi-1.38.0.tar.xz
+	tar xf libqmi-1.38.0.tar.gz
 	mkdir libqmi-1.38.0/build
 	cd libqmi-1.38.0/build && meson --prefix=/usr --buildtype=release -D bash_completion=false -D qrtr=false -D man=false -Dudev=false -Dmbim_qmux=false -Dintrospection=false ..
 	cd libqmi-1.38.0/build && ninja