[tracker/sam/ci-ubuntu] ci: Fix locale problems

[Sam Thursfield <sthursfield src gnome org>]

commit 133b8fa2d095efd5a65f5d4be2f97acd28a4837f
Author: Sam Thursfield <sam afuera me uk>
Date:   Sat Dec 14 00:25:24 2019 +0100

    ci: Fix locale problems
    
    Apparently C.UTF-8 is the standard name, and C.utf8 is not. At least,
    the latter doesn't seem to work in Ubuntu.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3ed080c66..ae87e4c64 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -30,7 +30,7 @@ stages:
       # We limit `meson test` to 4 parallel test processes. The default is to
       # have one test process per CPU, but our tests are mostly IO bound
       # and we get timeouts and failures if we try to run 32 of them at once.
-      su tracker -c 'cd build; env LANG=C.UTF8 LC_ALL=C.UTF8 meson test --num-processes=4 --print-errorlogs 
${MESON_TEST_EXTRA_ARGS}'
+      su tracker -c 'cd build; env LANG=C.UTF-8 LC_ALL=C.UTF-8 meson test --num-processes=4 
--print-errorlogs ${MESON_TEST_EXTRA_ARGS}'
 
   after_script:
     - |