Implemented stat syscall

examples/readfile/readfile.q

@@ -0,0 +1,13 @@
+import fs
+import sys
+
+main() {
+	show("/proc/sys/kernel/ostype")
+	show("/proc/sys/kernel/osrelease")
+	show("/proc/sys/kernel/arch")
+}
+
+show(path []byte) {
+	contents, length := fs.readFile(path)
+	sys.write(1, contents, length)
+}