perl: fix perl-cross flag fiddling.

srcpkgs/perl/template

@@ -1,7 +1,7 @@
 # Template build file for 'perl'.
 pkgname=perl
 version=5.24.0
-revision=2
+revision=3
 _perl_cross_version=1.0.3
 build_style=gnu-configure
 hostmakedepends="less"
@@ -142,6 +142,10 @@ for f in ${provides}; do
 	replaces+=" $($XBPS_UHELPER_CMD getpkgname ${f})>=0"
 done
 
+post_extract() {
+	sed -i '/FILE_OFFSET_BITS/s/=64"/=64 "/' cnf/configure_prog.sh
+}
+
 do_configure() {
 	local _args="-Dusethreads -Duseshrplib -Dusesoname -Dusevendorprefix
 		-Dprefix=/usr -Dvendorprefix=/usr