package/kodi: add missing dependency on libdrm

When building Kodi with X11 support, libdrm is a mandatory dependency,
and it uses pkg-config to find it.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/kodi/Config.in

@@ -85,6 +85,7 @@ menuconfig BR2_PACKAGE_KODI
 	select BR2_PACKAGE_TAGLIB
 	select BR2_PACKAGE_TIFF
 	select BR2_PACKAGE_TINYXML
+	select BR2_PACKAGE_LIBDRM if BR2_PACKAGE_KODI_GL
 	select BR2_PACKAGE_XLIB_XMU if BR2_PACKAGE_KODI_GL # needed by rsxs screensaver
 	select BR2_PACKAGE_XLIB_XRANDR if BR2_PACKAGE_KODI_GL
 	select BR2_PACKAGE_XLIB_XT if BR2_PACKAGE_KODI_GL # needed by rsxs screensaver

package/kodi/kodi.mk

@@ -77,9 +77,11 @@ endif
 
 # quote from kodi/configure.in: "GLES overwrites GL if both set to yes."
 # we choose the opposite because opengl offers more features, like libva support
+# GL means X11, and under X11, Kodi needs libdrm; libdrm is forcefully selected
+# by a modular Xorg server, which Kodi already depends on.
 ifeq ($(BR2_PACKAGE_KODI_GL),y)
 KODI_DEPENDENCIES += libglew libglu libgl sdl_image xlib_libX11 xlib_libXext \
-	xlib_libXmu xlib_libXrandr xlib_libXt
+	xlib_libXmu xlib_libXrandr xlib_libXt libdrm
 KODI_CONF_OPTS += --enable-gl --enable-sdl --enable-x11 --enable-xrandr --disable-gles
 ifeq ($(BR2_PACKAGE_KODI_RSXS),y)
 # fix rsxs compile