Added empty (stubs in spec only) d3drm.

diff --git a/configure.ac b/configure.ac
index f30f029..6899543 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1513,6 +1513,7 @@
 dlls/d3d8/Makefile
 dlls/d3d9/Makefile
 dlls/d3dim/Makefile
+dlls/d3drm/Makefile
 dlls/d3dx8/Makefile
 dlls/dbghelp/Makefile
 dlls/dciman32/Makefile