[evince/wip/hadess/fix-ci] ci: Work-around bug in meson

[Bastien Nocera <hadess src gnome org>]

commit 591a9e3231e587e338daf6123278ee4143f0a728
Author: Bastien Nocera <hadess hadess net>
Date:   Sun Aug 25 11:06:58 2019 +0300

    ci: Work-around bug in meson
    
    Work-around race in meson's gtk-doc support:
    FileNotFoundError: [Errno 2] No such file or directory: 
'/builds/GNOME/evince/_build/help/reference/libdocument/html/libevdocument.devhelp2' -> 
'/builds/GNOME/evince/_build/help/reference/libdocument/html/libevdocument-3.0.devhelp2'

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 99434670..d32a21dd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -78,7 +78,7 @@ flatpak:
     script:
         - flatpak-builder --stop-at=evince app ${MANIFEST_PATH}
         - flatpak build app meson --prefix=/app ${MESON_ARGS} _build
-        - flatpak build app ninja -C _build install
+        - flatpak build app ninja -j1 -C _build install
         - flatpak-builder --finish-only --repo=_repo app ${MANIFEST_PATH}
         # Run automatic tests inside the Flatpak env
         - xvfb-run -a -s "-screen 0 1024x768x24" flatpak build app ninja -C _build test