www/gatling: Mark BROKEN

Gatling hasn't built for months and there's also a new version available.
Various errors but most common seems to be:
"ld: error: duplicate symbol: first_deferred"

Reference: https://portsfallout.com/fallout?port=www%2Fgatling%24&page=1

PR:		259180
Reported by:	pkg-fallout
Approved by:	port maintainer timeout (2+ weeks), arrowd (mentor)
Differential Revision:	https://reviews.freebsd.org/D32769

www/gatling/Makefile

@@ -11,8 +11,9 @@ COMMENT=	High performance webserver with scalability benchmark tools
 
 LICENSE=	GPLv2
 
-BROKEN_mips=		fails to compile: dirfd.c: error: expected ';', ',' or ')' before 'key'
-BROKEN_mips64=		fails to compile: dirfd.c: error: expected ';', ',' or ')' before 'key'
+BROKEN=		Outdated and doesn't compile "ld: error: duplicate symbol: first_deferred"
+BROKEN_mips=	fails to compile: dirfd.c: error: expected ';', ',' or ')' before 'key'
+BROKEN_mips64=	fails to compile: dirfd.c: error: expected ';', ',' or ')' before 'key'
 
 BUILD_DEPENDS=	libowfat>=0.31:devel/libowfat