package/glslsandbox-player: add wayland-protocols optional dependency

wayland-protocols is an optional dependency which is enabled by default
resulting in the following wayland build failure since the addition of
the package in commit f201ca9d0d25b491ec5e1ed4e1d02fd52d027997:

checking for wayland_client... yes
checking for wayland_egl... yes
configure: Wayland EGL support enabled
checking for wayland_protocols... no
configure: error: Package requirements (wayland-protocols >= 1.12) were not met:

Package 'wayland-protocols', required by 'virtual:world', not found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables wayland_protocols_CFLAGS
and wayland_protocols_LIBS to avoid the need to call pkg-config.

Fixes:
 - http://autobuild.buildroot.org/results/865af860f9e52fe5311bb0c6a246ff871ae5a989

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit ee13e3fb41dc7c0c001127733b5a599c1e509747)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/glslsandbox-player/Config.in

@@ -111,8 +111,11 @@ endchoice
 if BR2_PACKAGE_GLSLSANDBOX_PLAYER_WL
 config BR2_PACKAGE_GLSLSANDBOX_PLAYER_WL_IVI
 	bool "Wayland IVI shell support"
-endif
 
+config BR2_PACKAGE_GLSLSANDBOX_PLAYER_WL_XDG
+	bool "Wayland XDG shell support"
+	select BR2_PACKAGE_WAYLAND_PROTOCOLS
+endif
 endif
 
 comment "glslsandbox-player needs openGL ES and EGL driver"

package/glslsandbox-player/glslsandbox-player.mk

@@ -72,6 +72,12 @@ GLSLSANDBOX_PLAYER_CONF_OPTS += --enable-ivi
 else
 GLSLSANDBOX_PLAYER_CONF_OPTS += --disable-ivi
 endif
+ifeq ($(BR2_PACKAGE_GLSLSANDBOX_PLAYER_WL_XDG),y)
+GLSLSANDBOX_PLAYER_DEPENDENCIES += wayland-protocols
+GLSLSANDBOX_PLAYER_CONF_OPTS += --enable-wlxdg
+else
+GLSLSANDBOX_PLAYER_CONF_OPTS += --disable-wlxdg
+endif
 else ifeq ($(BR2_PACKAGE_GLSLSANDBOX_PLAYER_X11),y)
 GLSLSANDBOX_PLAYER_DEPENDENCIES += xlib_libX11
 GLSLSANDBOX_PLAYER_CONF_OPTS += --with-native-gfx=x11