base-chroot: add tzdata

Some packages require tzdata to testing, however, adding `tzdata` to
those checkdepends will break masterdir, since `tzdata` provides
`/usr/share/zoneinfo/UTC`, hence, it will be removed upon cleanup.

Let's add `tzdata` into `base-chroot` and remove the shenanigan in
`chroot.sh`.

common/xbps-src/shutils/chroot.sh

@@ -109,15 +109,7 @@ chroot_prepare() {
     # Some software expects /etc/localtime to be a symbolic link it can read to
     # determine the name of the time zone, so set up the expected link
     # structure.
-    if [ -f /usr/share/zoneinfo/UTC ]; then
-        tzfile=/usr/share/zoneinfo/UTC
-        mkdir -p $XBPS_MASTERDIR/usr/share/zoneinfo
-        cp /usr/share/zoneinfo/UTC $XBPS_MASTERDIR/usr/share/zoneinfo/UTC
-        ln -sf ../usr/share/zoneinfo/UTC $XBPS_MASTERDIR/etc/localtime
-    else
-        # Should never happen.
-        msg_warn "No local timezone configuration file created.\n"
-    fi
+    ln -sf ../usr/share/zoneinfo/UTC $XBPS_MASTERDIR/etc/localtime
 
     for f in dev sys tmp proc host boot; do
         [ ! -d $XBPS_MASTERDIR/$f ] && mkdir -p $XBPS_MASTERDIR/$f

srcpkgs/base-chroot/template

@@ -19,7 +19,7 @@ depends+="
  patch sed findutils diffutils make gzip coreutils
  file bsdtar xbps mpfr ncurses libreadline8
  chroot-bash chroot-grep chroot-gawk chroot-distcc
- chroot-util-linux chroot-git"
+ chroot-util-linux chroot-git tzdata"
 
 if [ "$CHROOT_READY" ]; then
 	depends+=" ccache"