Reorganized sys functions

lib/sys/fs_linux.q

@@ -0,0 +1,23 @@
+getcwd(buffer Pointer, length Int) -> Int {
+	return syscall(79, buffer, length)
+}
+
+chdir(path Pointer) -> Int {
+	return syscall(80, path)
+}
+
+rename(old Pointer, new Pointer) -> Int {
+	return syscall(82, old, new)
+}
+
+mkdir(path Pointer, mode Int) -> Int {
+	return syscall(83, path, mode)
+}
+
+rmdir(path Pointer) -> Int {
+	return syscall(84, path)
+}
+
+unlink(file Pointer) -> Int {
+	return syscall(87, file)
+}