build: fix check-dependencies test on OS X

Commit ed16c1e5 ("build: fix bundled
libcurl and c-ares build on OS X") fixed building libcurl with ares by
adding a dependency on libresolv for Mac OS X. It was forgotten to add
libresolv to check-dependencies exceptions for static build. Do this now.

NO_DOC=CI stuff
NO_TEST=CI stuff
NO_CHANGELOG=CI stuff