Added Makefile for NetBSD

Makefile.netbsd

@@ -0,0 +1,4 @@
+.include Makefile
+
+CFLAGS = -Wall -pedantic -DVERSION=\"$(VERSION)\" -I/usr/X11R7/include
+LDFLAGS = -L/usr/X11R7/lib -Wl,-R/usr/X11R7/lib -L/usr/pkg/lib -Wl,-R/usr/pkg/lib