games/scourge: prepare for freetype2 update

- freetype2 will no longer ship freetype-config (which was a pkg-config
wrapper) in the near future -- use pkg-config to gather the required
flags.

PR:             251512

games/scourge/Makefile

@@ -14,7 +14,7 @@ COMMENT=	Rogue-like game
 LIB_DEPENDS=	libfreetype.so:print/freetype2
 RUN_DEPENDS=	${LOCALBASE}/${DATADIR_REL}/config/scourge.cfg:games/scourge-data
 
-USES=		autoreconf compiler gettext gl gmake localbase sdl
+USES=		autoreconf compiler gettext gl gmake localbase pkgconfig sdl
 GNU_CONFIGURE=	yes
 USE_GL=		gl
 USE_SDL=	sdl image mixer net ttf
@@ -31,6 +31,8 @@ WRKSRC=		${WRKDIR}/${PORTNAME}
 OPTIONS_DEFINE=	DEBUG
 DEBUG_CONFIGURE_ENABLE=	debug
 
+BINARY_ALIAS=	freetype-config=true
+
 post-patch:
 	@${REINPLACE_CMD} -e 's|GLvoid|void|g' ${WRKSRC}/src/sdlhandler.cpp ${WRKSRC}/src/sdlhandler.h
 	@${REINPLACE_CMD} -e 's|\([^a-z_]\)type(|\1squirrel_type(|g' ${WRKSRC}/src/squirrel/*.cpp ${WRKSRC}/src/squirrel/*.h

games/scourge/files/patch-configure.in

@@ -1,10 +1,25 @@
---- configure.in.orig	2008-12-22 23:38:10.000000000 +0000
-+++ configure.in	2010-06-14 11:57:29.000000000 +0000
-@@ -493,3 +493,6 @@
+--- configure.in.orig	2008-12-22 23:38:10 UTC
++++ configure.in
+@@ -421,8 +421,8 @@ if test "$FREETYPE" = "no"; then
+   AC_MSG_ERROR(Cannot find freetype2: Is freetype-config in path?)
+   have_FREETYPE=no
+ else
+-  FREETYPE_CFLAGS=`freetype-config --cflags`
+-  FREETYPE_LIBS=`freetype-config --libs`
++  FREETYPE_CFLAGS=`pkg-config freetype2 --cflags`
++  FREETYPE_LIBS=`pkg-config freetype2 --libs`
+   have_FREETYPE=yes
+ fi
+ fi
+@@ -491,7 +491,10 @@ if test "x$has_glx_get_proc" = "xyes" ; then 
+ fi
+
  dnl Check for glext.h 
 -AC_CHECK_HEADERS( "GL/glext.h", have_glext_h=yes, have_glext_h=no )
 +dnl XXX: which requires GL/gl.h, and autoconf > 2.64 is barfing on this
 +dnk XXX: use following check to cover the bases
 +dnl AC_CHECK_HEADERS( "GL/glext.h", have_glext_h=yes, have_glext_h=no )
 +have_glext_h=yes
 
+ if test "x$have_glext_h" = "xno" ; then
+     AC_MSG_ERROR([