emulators/uae: the port had been improved (+)

- Unbreak the build on modern FreeBSD versions by avoiding
  injecting duplicate symbols in the object files
- Drop MAKE_JOBS_UNSAFE: it was added back in 2013 in the
  commit 2a5c8652 to fix the build error:

    crt1.c:(.text+0xa8): undefined reference to `main'
    gmake[2]: *** [build68k] Error 1

  which no longer manifests itself

PR:	256577

emulators/uae/Makefile

@@ -11,11 +11,7 @@ COMMENT=	Commodore Amiga emulator
 
 LICENSE=	GPLv2
 
-BROKEN_FreeBSD_13=	ld: error: duplicate symbol: socketbases
-BROKEN_FreeBSD_14=	ld: error: duplicate symbol: socketbases
-
 CONFLICTS=	e-uae-[0-9]*
-MAKE_JOBS_UNSAFE=yes
 
 USES=		gmake gnome pkgconfig tar:bzip2
 GNU_CONFIGURE=	yes
@@ -26,6 +22,8 @@ OPTIONS_DEFINE=	DOCS
 post-patch:
 	@${REINPLACE_CMD} -e 's|build68kc|build68k|' \
 		${WRKSRC}/src/Makefile.in
+	@${REINPLACE_CMD} -e 's|struct socketbase {|extern &|' \
+		${WRKSRC}/src/include/bsdsocket.h
 	@${LN} -sf ../md-ppc/support.c ${WRKSRC}/src/md-ppc-gcc/support.c
 
 do-install: