[Libguestfs] [PATCH] builder: templates: For RHEL, CentOS >= 7 and all Fedora, default to GPT.

[Richard W.M. Jones]

I didn't test this one fully yet, but I'm building Fedora 26 ppc64/le
test images now.  However it seems like it could be a good idea.  I
wonder if anyone depends on the images we supply being MBR-based?

Rich.