build: Port to meson

And remove the autotools. Faster, cleaner.

https://bugs.freedesktop.org/show_bug.cgi?id=106514

doc/meson.build

@@ -0,0 +1,17 @@
+cdata = configuration_data()
+cdata.set('SRCDIR', join_paths(meson.source_root(), 'libfprint'))
+cdata.set('BUILDDIR', join_paths(meson.build_root(), 'doc'))
+
+cfg = configure_file(input: 'doxygen.cfg.in',
+                     output: 'doxygen.cfg',
+                     configuration: cdata,
+                     install: false)
+
+doxygen = find_program('doxygen')
+datadir = join_paths(get_option('datadir'), 'doc', 'libfprint-devel')
+custom_target('docs',
+              input: cfg,
+              output: 'html',
+              command: [ doxygen, '@INPUT@' ],
+              install: true,
+              install_dir: datadir)