README: mention also pkg-config as a build dependency

diff --git a/README b/README
index 2bffa04..4df0713 100644 (file)
--- a/README
+++ b/README
@@ -27,5 +27,6 @@ NOTE: the "redglass" and "whiteglass" cursor themes are sometimes provided in
 a separate package called "xcursor-themes".
 
 Dependencies:
+  - pkg-config
   - libxcursor-dev
   - libxi-dev