[gimp/meson: 113/128] Do not always build custom_targets (they fail on windows)

[Félix Piédallu <fpiedallu src gnome org>]

commit 757051487e61753fbcf7cd714a6e9283963aeb2b
Author: Félix Piédallu <felix piedallu me>
Date:   Tue Jan 30 11:24:45 2018 +0100

    Do not always build custom_targets (they fail on windows)

 data/tags/meson.build |    2 +-
 data/tips/meson.build |    4 ++--
 desktop/meson.build   |    2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/data/tags/meson.build b/data/tags/meson.build
index e634180..b6b4b6c 100644
--- a/data/tags/meson.build
+++ b/data/tags/meson.build
@@ -28,6 +28,6 @@ custom_target('validate-tags',
     '--path', meson.current_source_dir(),
     '--valid', '@INPUT@',
   ],
-  build_always: true,
+  build_always: false,
   build_by_default: false,
 )
diff --git a/data/tips/meson.build b/data/tips/meson.build
index 6c27377..ac70d2d 100644
--- a/data/tips/meson.build
+++ b/data/tips/meson.build
@@ -28,7 +28,7 @@ custom_target('validate-tips',
     '--path', meson.current_source_dir(),
     '--valid', '@INPUT@',
   ],
-  build_always: true,
+  build_always: false,
   build_by_default: false,
 )
 
@@ -43,6 +43,6 @@ custom_target('fortunes-tips',
     '@INPUT1@',
     '@INPUT0@',
   ],
-  build_always: true,
+  build_always: false,
   build_by_default: false,
 )
diff --git a/desktop/meson.build b/desktop/meson.build
index b4273c6..5e3f6a5 100644
--- a/desktop/meson.build
+++ b/desktop/meson.build
@@ -87,6 +87,6 @@ custom_target('validate-desktop',
   command: [
     desktop_validate, '@INPUT@',
   ],
-  build_always: true,
+  build_always: false,
   build_by_default: false,
 )