[Tile-serving] [osm2pgsql] Fix warnings when compiling tests, use -Werror with travis (#395)

[Paul Norman]

*Needs Travis build still*

This fixes the warnings present with `make check`, and turning warnings into errors in CI should stop new ones from appearing.
You can view, comment on, or merge this pull request online at:

  https://github.com/openstreetmap/osm2pgsql/pull/395

-- Commit Summary --

  * fix test permissions
  * Stop the boost system tests from raising a warning
  * Update C++11 macro from Autoconf Archive
  * Don't pass by reference for setting up extensions in tests
  * Fix skip_test.what() function defs
  * Strip out unused z_order test code
  * Treat warnings as errors in Travis

-- File Changes --

    M .travis.yml (1)
    M m4/ax_boost_system.m4 (4)
    M m4/ax_cxx_compile_stdcxx_11.m4 (31)
    M tests/common-pg.cpp (2)
    M tests/common-pg.hpp (2)
    M tests/test-output-pgsql-tablespace.cpp (2)
    M tests/test-output-pgsql-z_order.cpp (23)
    M tests/test-output-pgsql.cpp (2)

-- Patch Links --

https://github.com/openstreetmap/osm2pgsql/pull/395.patch
https://github.com/openstreetmap/osm2pgsql/pull/395.diff

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/pull/395
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