winsys/sw/dri: Convert to automake
diff --git a/configure.ac b/configure.ac
index 0d4fbc0..245bf91 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2033,6 +2033,7 @@
 		src/gallium/winsys/radeon/drm/Makefile
 		src/gallium/winsys/svga/drm/Makefile
 		src/gallium/winsys/sw/Makefile
+		src/gallium/winsys/sw/dri/Makefile
 		src/gbm/Makefile
 		src/gbm/main/gbm.pc
 		src/glsl/Makefile