[epiphany/mcatanzaro/cancellables] CI: suppress cppcheck unreadVariable warning

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 914027678cc37b599e4971e25d558779b3a32f66
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Dec 17 15:57:59 2019 -0600

    CI: suppress cppcheck unreadVariable warning
    
    It's throwing an obvious false-positive warning. Not impressed by
    cppcheck. :/

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d24d894d2..56de29e4a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -30,6 +30,7 @@ cppcheck:
     --suppress=literalWithCharPtrCompare
     --suppress=memleak
     --suppress=redundantAssignment
+    --suppress=unreadVariable
     --suppress=variableScope
     --suppress=varFuncNullUB
     --suppress=*:lib/contrib/gvdb/*