package/supertuxkart: needs freetype

https://github.com/supertuxkart/stk-code/blob/master/CMakeLists.txt#L231

Build would fail without this patch using this defconfig:

BR2_x86_64=y
BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
BR2_TOOLCHAIN_BUILDROOT_CXX=y
BR2_PACKAGE_SUPERTUXKART=y
BR2_PACKAGE_MESA3D=y
BR2_PACKAGE_MESA3D_DRI_DRIVER_I965=y
BR2_PACKAGE_MESA3D_OPENGL_EGL=y
BR2_PACKAGE_XORG7=y

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Romain Naour <romain.naour@gmail.com>
Tested-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/supertuxkart/Config.in

@@ -9,6 +9,7 @@ config BR2_PACKAGE_SUPERTUXKART
 	depends on BR2_PACKAGE_HAS_LIBGL
 	depends on BR2_PACKAGE_XORG7
 	depends on !BR2_TOOLCHAIN_USES_MUSL
+	select BR2_PACKAGE_FREETYPE
 	select BR2_PACKAGE_JPEG
 	select BR2_PACKAGE_LIBCURL
 	select BR2_PACKAGE_LIBGLU

package/supertuxkart/supertuxkart.mk

@@ -15,6 +15,7 @@ SUPERTUXKART_LICENSE = GPL-3.0+
 SUPERTUXKART_LICENSE_FILES = COPYING
 
 SUPERTUXKART_DEPENDENCIES = \
+	freetype \
 	jpeg \
 	libcurl \
 	libgl \