libs/vkd3d: Add library.

Makefile.am

@@ -1,4 +1,6 @@
 ACLOCAL_AMFLAGS = -I m4
+AM_CFLAGS = @VKD3D_CFLAGS@
+AM_CPPFLAGS = -I$(srcdir)/include -I$(srcdir)/include/dummy
 
 widl_headers = \
 	include/d3d12.h
@@ -6,5 +8,9 @@ widl_headers = \
 BUILT_SOURCES = $(widl_headers)
 CLEANFILES = $(widl_headers)
 
+lib_LTLIBRARIES = libvkd3d.la
+libvkd3d_la_SOURCES = \
+	libs/vkd3d/vkd3d_main.c
+
 $(widl_headers): %.h: %.idl
 	$(WIDL) -o $@ $<