check: Fix run-coredump-unwind-mdi when in a out-of-tree build.
# it is tested using the coredump accessors. For more info about MiniDebugInfo
# see e.g. http://fedoraproject.org/wiki/Features/MiniDebugInfo
-./run-coredump-unwind -minidebuginfo
+${0%/*}/run-coredump-unwind -minidebuginfo
