gio: Rename gcontenttype.c to gcontenttype-fdo.c

This reflects its status as actually platform-dependent: it’s only built
on systems using the freedesktop.org content type system.

It makes the file naming match up with other platform-specific
implementations, such as `gcontenttype-win32.c` and
`gcontenttype-osx.m`.

A subsequent commit will introduce a platform-independent high level API
wrapper so that the introspection annotations from this file can be
reused between platforms.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>

Helps: #3399

gio/meson.build

@@ -405,7 +405,7 @@ if host_system != 'windows'
     )
     application_headers += files('gosxappinfo.h')
   else
-    contenttype_sources += files('gcontenttype.c')
+    contenttype_sources += files('gcontenttype-fdo.c')
     unix_sources += files('gdesktopappinfo.c')
     gio_unix_include_headers += files('gdesktopappinfo.h')
     launch_desktop_sources = files('gio-launch-desktop.c')

po/POTFILES.in

@@ -12,7 +12,7 @@ gio/gbufferedoutputstream.c
 gio/gbytesicon.c
 gio/gcancellable.c
 gio/gcharsetconverter.c
-gio/gcontenttype.c
+gio/gcontenttype-fdo.c
 gio/gcontenttype-win32.c
 gio/gconverter.c
 gio/gconverterinputstream.c

tools/glib.supp

@@ -896,7 +896,7 @@
 	fun:g_get_home_dir
 }
 
-# gcontenttype.c caches a one-time allocation global array of @global_mime_dirs.
+# gcontenttype-fdo.c caches a one-time allocation global array of @global_mime_dirs.
 {
 	content_type_mime_dirs_realloc
 	Memcheck:Leak