[gnome-photos/wip/rishi/drop-autotools] build: Drop the Autotools build system

[Debarshi Ray <debarshir src gnome org>]

commit 24e411b53e352e30f279a60d08782dea5e5ab3b1
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Aug 26 15:32:28 2019 +0300

    build: Drop the Autotools build system
    
    Meson has been the preferred build system for a while now, and there
    are currently no known issues with it. Having to maintain one less
    build system is a big win.
    
    https://gitlab.gnome.org/GNOME/gnome-photos/merge_requests/113

 Makefile.am                     |  41 ---
 autogen.sh                      |  40 ---
 configure.ac                    | 153 ---------
 data/Makefile.am                |  64 ----
 data/icons/Makefile.am          |  63 ----
 git.mk                          | 400 -----------------------
 glib-tap.mk                     | 136 --------
 help/Makefile.am                |  20 --
 m4/ax_append_compile_flags.m4   |  67 ----
 m4/ax_append_flag.m4            |  71 ----
 m4/ax_append_link_flags.m4      |  65 ----
 m4/ax_check_compile_flag.m4     |  74 -----
 m4/ax_check_link_flag.m4        |  74 -----
 m4/ax_compiler_flags.m4         | 158 ---------
 m4/ax_compiler_flags_cflags.m4  | 140 --------
 m4/ax_compiler_flags_gir.m4     |  60 ----
 m4/ax_compiler_flags_ldflags.m4 |  92 ------
 m4/ax_is_release.m4             |  80 -----
 m4/ax_require_defined.m4        |  37 ---
 m4/glibtests.m4                 |  31 --
 po/Makevars                     |  78 -----
 src/Makefile.am                 | 702 ----------------------------------------
 tap-driver.sh                   | 652 -------------------------------------
 tap-test                        |   5 -
 tests/Makefile.am               |  31 --
 tests/unit/Makefile.am          |  61 ----
 26 files changed, 3395 deletions(-)