ci: workaround broken opensuse leap 15.5 tirpc

Temporarily disable '-Wmissing-include-dirs' becuase the
libtirpc pkg-config file has a bogus include dir. The
headers can fortunately still be found since they are
in the system include dir.

Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

ci/gitlab/builds.yml

@@ -332,6 +332,7 @@ x86_64-opensuse-leap-15-prebuilt-env:
       optional: true
   allow_failure: false
   variables:
+    CFLAGS: -Wno-missing-include-dirs
     NAME: opensuse-leap-15
     RPM: skip
 
@@ -340,6 +341,7 @@ x86_64-opensuse-leap-15-local-env:
   needs: []
   allow_failure: false
   variables:
+    CFLAGS: -Wno-missing-include-dirs
     IMAGE: registry.opensuse.org/opensuse/leap:15.5
     NAME: opensuse-leap-15
     RPM: skip

ci/manifest.yml

@@ -201,6 +201,8 @@ targets:
       - arch: x86_64
         variables:
           RPM: skip
+          # Keep until fix for: https://bugzilla.opensuse.org/show_bug.cgi?id=1216862
+          CFLAGS: -Wno-missing-include-dirs
 
   opensuse-tumbleweed:
     jobs: