lang/gcc14-devel: Restore PORTEPOCH

In spite of 2f1558e, portmgr emails
keep complaining that version number is going backward and some tools
will break. So restore PORTEPOCH.

Fixes: 2f1558e lang/gcc14-devel: Remove unnecessary PORTEPOCH

lang/gcc14-devel/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	gcc
 PORTVERSION=	14.0.1.s20240114
+PORTEPOCH=	1
 CATEGORIES=	lang
 MASTER_SITES=	GCC/snapshots/${DIST_VERSION}
 PKGNAMESUFFIX=	${SUFFIX}-devel