[Tile-serving] [mod_tile] Add mapnik's dependencies to MAPNIK_INCLUDES (#83)

[Tom Hughes]

Without this we may fail to find the headers for things like agg if they aren't already on the include path.
You can merge this Pull Request by running:

  git pull https://github.com/tomhughes/mod_tile mapnik

Or you can view, comment on it, or merge it online at:

  https://github.com/openstreetmap/mod_tile/pull/83

-- Commit Summary --

  * Add mapnik's dependencies to MAPNIK_INCLUDES

-- File Changes --

    M m4/ax_lib_mapnik.m4 (1)

-- Patch Links --

https://github.com/openstreetmap/mod_tile/pull/83.patch
https://github.com/openstreetmap/mod_tile/pull/83.diff

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/mod_tile/pull/83
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