yaml-cpp: Better to only build static libraries?

[Richard Shaw]

Per https://bugzilla.redhat.com/show_bug.cgi?id=1539386 I've now been
bitten twice after being asked to update a package in EPEL.

Per this version this was a patch level update but it still breaks
applications so I'm wondering if it would just be best to only supply a
static library, at least in EPEL...

Thanks,
Richard