add some README dependency notes

diff --git a/README b/README
index 07ab55f..2ce1be2 100644 (file)
--- a/README
+++ b/README
@@ -473,9 +473,9 @@ Required by default:
     libxcursor
     libxp
     libxi
-    libgl
+    libgl (opengl/glx or opengl-es2/egl)
     giflib
-    util-linux
+    util-linux (limbount + libblkid)
     systemd / libudev
 
 Recommended requirements (highly recommended):