scripts: Add missing makefile.clang reference to README.txt
diff --git a/scripts/README.txt b/scripts/README.txt
index c3425c3..326160c 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -13,6 +13,7 @@
makefile.atari => Atari makefile
makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode)
makefile.beos => BeOS makefile
+ makefile.clang => Generic clang makefile
makefile.darwin => Darwin makefile, for macOS (formerly Mac OS X)
makefile.dec => DEC Alpha UNIX makefile
makefile.dj2 => DJGPP 2 makefile
