games/libretro-uae: Fix build on 13.x and 14.x

PR:	256764
(cherry picked from commit 45e4a00)

games/libretro-uae/Makefile

@@ -8,8 +8,6 @@ COMMENT=	Libretro port of UAE
 
 LICENSE=	GPLv2
 
-BROKEN_FreeBSD_13=	ld: error: duplicate symbol: potgo_value
-BROKEN_FreeBSD_14=	ld: error: duplicate symbol: potgo_value
 BROKEN_riscv64=		fails to compile: ./sources/src/machdep/maccess.h:51:14: unrecognized instruction mnemonic
 
 USES=		compiler:c++11-lib gmake gl
@@ -20,6 +18,8 @@ USE_GITHUB=	yes
 GH_ACCOUNT=	libretro
 GH_TAGNAME=	8333daa
 
+CFLAGS+=	-fcommon
+
 LDFLAGS_i386=	-Wl,-z,notext
 
 PLIST_FILES=	lib/libretro/puae_libretro.so