[Bug 1255179] Review Request: runc - CLI for running Open Containers

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1255179

--- Comment #19 from Jan Chaloupka  ---
In addition I have:
- modified ExclusiveArch and BuildRequires in a top of the spec file
- removed ExclusiveArch from unit-test subpackage and modified BuildRequires
- removed definition of gobuild and gotest functions from %build and %check and
replaced them with new %gobuild and %gotest macros defined in go-compilers
packages (brought by compiler(go-compiler) BR)