games/searchandrescue: Fix build on 12.0-CURRENT

Respect CPPFLAGS and stop doing weird things like defining __cplusplus
in the build itself.

In file included from <built-in>:388:
<command line>:8:9: warning: '__cplusplus' macro redefined [-Wmacro-redefined]
#define __cplusplus 1
        ^
<built-in>:384:9: note: previous definition is here
#define __cplusplus 201402L
        ^
In file included from disk.cpp:1:
In file included from /usr/include/c++/v1/stdio.h:102:
/usr/include/c++/v1/__config:327:20: error: cannot combine with previous 'char16_t' declaration specifier
typedef __char16_t char16_t;
                   ^
/usr/include/c++/v1/__config:328:20: error: cannot combine with previous 'char32_t' declaration specifier
typedef __char32_t char32_t;
                   ^

http://beefy12.nyi.freebsd.org/data/head-amd64-default/p475478_s336801/logs/errors/SearchAndRescue-1.4.0_6.log

While here
- Add license
- Add missing dependencies

games/searchandrescue/Makefile

@@ -3,18 +3,21 @@
 
 PORTNAME=	SearchAndRescue
 PORTVERSION=	1.4.0
-PORTREVISION=	6
+PORTREVISION=	7
 CATEGORIES=	games
 MASTER_SITES=	SF/${PORTNAME:tl}/Program/
 
 MAINTAINER=	jessefrgsmith@yahoo.ca
 COMMENT=	Flight simulator in which the player rescues people
 
+LICENSE=	GPLv2
+LICENSE_FILE=	${WRKSRC}/LICENSE
+
 RUN_DEPENDS=	${LOCALBASE}/share/searchandrescue/human.ini:games/searchandrescue-data
 
 USE_SDL=	mixer
-USE_XORG=	x11 xau xdmcp xext xmu xpm xxf86vm
-USE_GL=		glu
+USE_XORG=	ice sm x11 xau xdmcp xext xmu xpm xxf86vm
+USE_GL=		gl glu
 WRKSRC=		${WRKDIR}/${PORTNAME:tl}_${PORTVERSION}
 
 PLIST_FILES=	bin/${PORTNAME} \
@@ -30,6 +33,7 @@ post-patch:
 		-e 's,/usr/local,${LOCALBASE},g' \
 		-e 's,/usr/X11R6,${LOCALBASE},g' \
 		-e '/^CFLAGS = /s,=,= ${CFLAGS},g' \
+		-e '/^CPPFLAGS = /s, = .*, = ${CPPFLAGS},g' \
 		-e '/^CC = /s, = .*, = ${CC},' \
 		-e '/^CPP = /s, = .*, = ${CXX},' \
 		-e 's,-O6,,' \