* gnu/packages/virtualization.scm (runc): Update to 1.0.0-rc93.
[source]: Remove the patches field.
[phases]{unpack}: Remove override.
{build}: Add the man target.
{check}: Make conditional based on TESTS?.
{install}: Add the install-man target.
[native-inputs]: Add go-github-com-go-md2man.
[home-page]: Update.
* gnu/packages/patches/runc-CVE-2019-5736.patch: Delete file.
* gnu/local.mk: Un-register it.