emulators/libretro-bsnes: Update to v115.a.20231101

Also remove dependency on GCC ports: this makes it easier to update
GCC_DEFAULT. Moreover, the port now builds with lang/gcc13.

Set PORTEPOCH to use a version scheme more consistent with
https://docs.freebsd.org/en/books/porters-handbook/book/#makefile-master_sites-github

PR:		273678
Approved by:	Timothy Beyer <beyert@cs.ucr.edu>

emulators/libretro-bsnes/Makefile

@@ -1,6 +1,7 @@
 PORTNAME=	libretro-bsnes
-PORTVERSION=	20211218
-PORTREVISION=	1
+DISTVERSIONPREFIX=	v
+DISTVERSION=	115.a.20231101
+PORTEPOCH=	1
 CATEGORIES=	emulators games
 
 MAINTAINER=	beyert@cs.ucr.edu
@@ -9,14 +10,13 @@ WWW=		https://github.com/libretro/bsnes-libretro
 
 LICENSE=	GPLv3
 
-USES=		compiler:c++11-lib gmake
-
-USE_GCC=	yes
+USES=		gmake
+USE_GCC=	13
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	libretro
 GH_PROJECT=	bsnes-libretro
-GH_TAGNAME=	9549275
+GH_TAGNAME=	0685381
 
 USE_LDCONFIG=	yes
 

emulators/libretro-bsnes/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1640163197
-SHA256 (libretro-bsnes-libretro-20211218-9549275_GH0.tar.gz) = 76f5de645b425ddd9c90085fc5d5b9309c378475e964d149aed253569fc8aa76
-SIZE (libretro-bsnes-libretro-20211218-9549275_GH0.tar.gz) = 7281394
+TIMESTAMP = 1701887186
+SHA256 (libretro-bsnes-libretro-v115.a.20231101-0685381_GH0.tar.gz) = c6390e7c52993d12dcdda04711d1825270398182e5f0fd64ec4e310a9df5cad9
+SIZE (libretro-bsnes-libretro-v115.a.20231101-0685381_GH0.tar.gz) = 7324127