templater: try to read %include in mapfiles from resources
The "show" style is an example of a style that uses an "%include"
statement in its definition. This patch makes `hg log --style show`
work.
This takes the number of failing tests with PyOxidizer from 72 to 62.
Differential Revision: https://phab.mercurial-scm.org/D8896
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"phabricator.uri": "https://phab.mercurial-scm.org/",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}