[gtk] Rename project files

[Emmanuele Bassi <ebassi src gnome org>]

commit b56c0fb5965d9a28f9b5603329544599ff2c18c8
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Feb 6 10:42:50 2019 +0100

    Rename project files
    
    Meson and DOAP are the last holdovers for the old "gtk+" name.

 gtk.doap    | 2 +-
 meson.build | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk.doap b/gtk.doap
index f0d0c80920..c07b9eb791 100644
--- a/gtk.doap
+++ b/gtk.doap
@@ -5,7 +5,7 @@
          xmlns:gnome="http://api.gnome.org/doap-extensions#";
          xmlns="http://usefulinc.com/ns/doap#";>
 
-  <name xml:lang="en">gtk+</name>
+  <name xml:lang="en">gtk</name>
   <shortname>gtk</shortname>
   <shortdesc xml:lang="en">Multi-platform toolkit</shortdesc>
   <description xml:lang="en">GTK is a multi-platform toolkit for creating graphical user
diff --git a/meson.build b/meson.build
index c2bd69710b..6987df6b16 100644
--- a/meson.build
+++ b/meson.build
@@ -1,4 +1,4 @@
-project('gtk+', 'c',
+project('gtk', 'c',
         version: '3.94.0',
         default_options: [
           'buildtype=debugoptimized',