[sysprof] build: Use LINGUAS file for help

[Piotr Drąg <piotrdrag src gnome org>]

commit dfe3a10ea5c910b6ceea0e23d45219b3e0e4b83f
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Mar 18 18:42:47 2018 +0100

    build: Use LINGUAS file for help
    
    The old method is deprecated.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=794457

 help/LINGUAS     |    5 +++++
 help/meson.build |    1 -
 2 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/help/LINGUAS b/help/LINGUAS
new file mode 100644
index 0000000..85d027f
--- /dev/null
+++ b/help/LINGUAS
@@ -0,0 +1,5 @@
+cs
+de
+pl
+pt_BR
+sv
diff --git a/help/meson.build b/help/meson.build
index 30e16a3..5e0393b 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -1,4 +1,3 @@
 gnome.yelp('sysprof',
   sources: ['index.page', 'introduction.page', 'profiling.page', 'faq.page', 'legal.xml'],
-  languages: ['cs', 'de', 'pl', 'pt_BR', 'sv'],
 )