context: Use g_shell_parse_argv() to parse shell commandlines
context: Use g_shell_parse_argv() to parse shell commandlines

This way we do the same thing the shell would - we'll handle any
quotes, tabs, leading spaces, etc. in the command line.

Conan-Kudo/libhif,rpm-software-management/libdnf,edynox/libdnf,cgwalters/libhif,cgwalters/libhif,edynox/libdnf,edynox/libdnf,Conan-Kudo/libhif,rpm-software-management/libdnf,juhp/libhif,hughsie/libhif,hughsie/libhif,edynox/libdnf,cgwalters/libhif,cgwalters/libhif,rpm-software-management/libhif,Conan-Kudo/libhif,rpm-software-management/libdnf,juhp/libhif,rpm-software-management/libhif,Conan-Kudo/libhif,rpm-software-management/libhif,hughsie/libhif,rpm-software-management/libdnf,rpm-software-management/libhif,hughsie/libhif