gbm: Link to libwayland-drm if Wayland EGL platform is enabled

We were relying on libEGL to pull in libwayland-client symbols, but with
commit 2c2e64edab cleaned up the
symbol leak.

https://bugs.freedesktop.org/show_bug.cgi?id=67962

src/Makefile.am

@@ -29,6 +29,10 @@ if HAVE_DRI_GLX
 SUBDIRS += glx
 endif
 
+if HAVE_EGL_PLATFORM_WAYLAND
+SUBDIRS += egl/wayland
+endif
+
 if HAVE_GBM
 SUBDIRS += gbm
 endif

src/egl/Makefile.am

@@ -21,8 +21,4 @@
 
 SUBDIRS=
 
-if HAVE_EGL_PLATFORM_WAYLAND
-SUBDIRS += wayland
-endif
-
 SUBDIRS += drivers main

src/gbm/Makefile.am

@@ -24,6 +24,7 @@ libgbm_la_LIBADD = $(LIBUDEV_LIBS) $(LIBKMS_LIBS) $(DLOPEN_LIBS)
 if HAVE_EGL_PLATFORM_WAYLAND
 AM_CPPFLAGS = -DHAVE_WAYLAND_PLATFORM
 AM_CFLAGS += $(WAYLAND_CFLAGS)
+libgbm_la_LIBADD += $(top_builddir)/src/egl/wayland/wayland-drm/libwayland-drm.la $(WAYLAND_LIBS)
 endif
 
 if HAVE_DRI
@@ -38,7 +39,7 @@ libgbm_dri_la_CFLAGS = \
 	$(LIBDRM_CFLAGS)
 
 libgbm_la_LIBADD += \
-	libgbm_dri.la $(top_builddir)/src/mapi/shared-glapi/libglapi.la
+	libgbm_dri.la $(top_builddir)/src/mapi/shared-glapi/libglapi.la $(LIBDRM_LIBS)
 endif
 
 all-local: libgbm.la