[gtk+] meson.build: enable-tests -> build-tests

[Javier Jardón Cabezas <jjardon src gnome org>]

commit 80e3239033d1e8d50074e18c96dd438f757088ce
Author: Javier Jardón <jjardon gnome org>
Date:   Wed Sep 6 20:45:00 2017 +0100

    meson.build: enable-tests -> build-tests
    
    This completes b5e00d36f084b827c48e4c9b8adc8fcedc14f2ff

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index 9c9abff..0b1df53 100644
--- a/meson.build
+++ b/meson.build
@@ -521,7 +521,7 @@ subdir('gdk')
 subdir('gsk')
 subdir('gtk')
 subdir('modules')
-if get_option('enable-tests')
+if get_option('build-tests')
   subdir('tests')
   subdir('testsuite')
 endif