On Solaris, make gcc7:libs:standard a run-depends on every variant
On Solaris, make gcc7:libs:standard a run-depends on every variant

Make all packages depend on the package that contains libgcc_s.so helps
avoid up to hundreds C_USES keywords to accomplish this on ports that
don't have dependencies that pull it in anyway.

jrmarino/ravenadm,jrmarino/ravenadm,jrmarino/ravenadm