games/stuntrally: Mark BROKEN

Fails to compile on all supported versions of FreeBSD with:
member access into incomplete type 'Ogre::*

Approved by:	portmgr (blanket)
Sponsored by:	The FreeBSD Foundation

games/stuntrally/Makefile

@@ -10,6 +10,8 @@ WWW=		https://stuntrally.tuxfamily.org/
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/License.txt
 
+BROKEN=	fails to compile: member access into incomplete type Ogre::
+
 LIB_DEPENDS=	libboost_thread.so:devel/boost-libs
 
 USE_GITHUB=	yes