[gtk] ci: Use UTF-8 encoding for the test cover report

[Emmanuele Bassi <ebassi src gnome org>]

commit eadd90c22ede241cc2619e0d17341988b5ebf0f3
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sat Apr 6 14:20:02 2019 +0100

    ci: Use UTF-8 encoding for the test cover report
    
    Since we're embedding text coming from the tests into the report, we
    should specify an encoding for both the source JSON file and the target
    XML file when opening them.

 .gitlab-ci/meson-junit-report.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci/meson-junit-report.py b/.gitlab-ci/meson-junit-report.py
index afc5d53c44..ea49282487 100755
--- a/.gitlab-ci/meson-junit-report.py
+++ b/.gitlab-ci/meson-junit-report.py
@@ -19,11 +19,11 @@ aparser.add_argument('--branch', metavar='NAME',
                      default='master')
 aparser.add_argument('--output', metavar='FILE',
                      help='The output file, stdout by default',
-                     type=argparse.FileType('w'),
+                     type=argparse.FileType('w', encoding='UTF-8'),
                      default=sys.stdout)
 aparser.add_argument('infile', metavar='FILE',
                      help='The input testlog.json, stdin by default',
-                     type=argparse.FileType('r'),
+                     type=argparse.FileType('r', encoding='UTF-8'),
                      default=sys.stdin)
 
 args = aparser.parse_args()