Fix-ups for linux-fbdev config.  No longer build Xlib driver sources.
diff --git a/configs/linux-fbdev b/configs/linux-fbdev
index 3ab6b69..7a5d1b6 100644
--- a/configs/linux-fbdev
+++ b/configs/linux-fbdev
@@ -4,6 +4,10 @@
 
 CONFIG_NAME = linux-fbdev
 
+DRIVER_DIRS = fbdev
+
+SRC_DIRS = mesa glu glut/fbdev
+
 CFLAGS = -O3 -ffast-math -ansi -pedantic -fPIC -ffast-math -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE -D_BSD_SOURCE -DPTHREADS -DUSE_GLFBDEV_DRIVER