firefox: disable gold linker on musl to unbreak the build.

Looks like the gold linker has issues with --hash-style=sysv|both,
and can't hide some symbols that should be hidden with --hash-style=gnu.

For now just disable the gold linker until we set ld's hash style to gnu,
like alpine and to match our gcc settings.

srcpkgs/firefox/template

@@ -57,6 +57,13 @@ do_configure() {
 	export ac_cv_sqlite_enable_unlock_notify=yes
 	export ac_cv_prog_hostcxx_works=1
 
+	case "$XBPS_TARGET_MACHINE" in
+	*-musl) # XXX gold linking with --hash-style=sysv results in unhidden symbols
+		# XXX see https://sourceware.org/ml/binutils/2014-09/msg00230.html
+		cross_args+=" --enable-gold=no"
+		;;
+	esac
+
 	cd xbps-build
 	SHELL=/bin/bash ../configure --prefix=/usr --libdir=/usr/lib \
 		--with-system-nspr --with-system-nss --with-system-bz2  \