xbps-src: force glibc locale generation on musl hosts.

localedef is only available with glibc, so that defer locale creation
once the chroot is ready.

This fixes installing bootstrap glibc pkgs on musl hosts.

xbps-src

@@ -303,7 +303,7 @@ install_bbootstrap() {
 
 reconfigure_bootstrap_pkgs() {
     local statefile="$XBPS_MASTERDIR/.xbps_chroot_configured"
-    local pkgs="ca-certificates"
+    local pkgs="glibc-locales ca-certificates"
     [ -z "$IN_CHROOT" -o -e $statefile ] && return 0
     # Reconfigure ca-certificates.
     msg_normal "Reconfiguring bootstrap packages...\n"