base: Ensure recipes using mercurial-native have certificates

If you try and fetch using mercurial-native, you see certificate errors since
it is configured to find ones in the sysroot, not the system. Add the missing
dependency so that mercurial recipes using the native tool work.

Found trying to make mirroring for old meta-oe stable branches work.

(From OE-Core rev: c48206dd82a2faab477002b1ac04d835920755d0)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit fc567e35b374f8b08975602609ee71e64357fb3d)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/classes-global/base.bbclass

@@ -634,7 +634,7 @@ python () {
         # Mercurial packages should DEPEND on mercurial-native
         elif uri.scheme == "hg":
             d.appendVar("EXTRANATIVEPATH", ' python3-native ')
-            d.appendVarFlag('do_fetch', 'depends', ' mercurial-native:do_populate_sysroot')
+            d.appendVarFlag('do_fetch', 'depends', ' mercurial-native:do_populate_sysroot ca-certificates-native:do_populate_sysroot')
 
         # OSC packages should DEPEND on osc-native
         elif uri.scheme == "osc":