Bug#939821: capnproto: test failure due to new gcc-9

Hello, please also add cmake to test dependencies

Bug#939821: capnproto: test failure due to new gcc-9

Source: capnproto Version: 0.7.0-4 Severity: serious Hello, your new test seems to be causing a link failure due to asneeded gcc default flag, because of wrong order in the link command line. The attached patch fixes the issue, by moving the pkg-config libs call after the cc file. Theoretica