tree-wide: fix deprecated GitLab URLs

They will stop working in the next GitLab release, so let's update them
ASAP to make sure things are propagated to everyone by then.

See:
https://about.gitlab.com/releases/2020/05/06/gitlab-com-13-0-breaking-changes/#removal-of-deprecated-project-paths

Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5111>
diff --git a/meson.build b/meson.build
index 3d4ea16..e0906de 100644
--- a/meson.build
+++ b/meson.build
@@ -46,7 +46,7 @@
   '-D__STDC_FORMAT_MACROS',
   '-D__STDC_LIMIT_MACROS',
   '-DPACKAGE_VERSION="@0@"'.format(meson.project_version()),
-  '-DPACKAGE_BUGREPORT="https://gitlab.freedesktop.org/mesa/mesa/issues"',
+  '-DPACKAGE_BUGREPORT="https://gitlab.freedesktop.org/mesa/mesa/-/issues"',
 ]
 
 with_vulkan_icd_dir = get_option('vulkan-icd-dir')
@@ -1530,7 +1530,7 @@
 
   # Disable deprecated keyword warnings, since we have to use them for
   # old-bison compat.  See discussion in
-  # https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2161
+  # https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2161
   if meson.version().version_compare('>= 0.52.0') and find_program('bison', required : false, version : '> 2.3').found()
     prog_bison = [prog_bison, '-Wno-deprecated']
   endif