qemu: Escape commas for qemuBuildDomainLoaderCommandLine
qemu: Escape commas for qemuBuildDomainLoaderCommandLine

Add comma escaping for loader->path and loader->nvram.

Signed-off-by: Sukrit Bhatnagar <02d85ae20d84d76725fbb98cf67368d465476907@gmail.com>
Reviewed-by: John Ferlan <87558058f6f829e5ec976c8ef960720af4ff9c7d@redhat.com>

zippy2/libvirt,andreabolognani/libvirt,olafhering/libvirt,zippy2/libvirt,libvirt/libvirt,nertpinx/libvirt,crobinso/libvirt,andreabolognani/libvirt,nertpinx/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,eskultety/libvirt,nertpinx/libvirt,libvirt/libvirt,crobinso/libvirt,zippy2/libvirt,olafhering/libvirt,jfehlig/libvirt,jardasgit/libvirt,olafhering/libvirt,jardasgit/libvirt,jfehlig/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,crobinso/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,jardasgit/libvirt,libvirt/libvirt,andreabolognani/libvirt,libvirt/libvirt,fabianfreyer/libvirt,eskultety/libvirt,zippy2/libvirt,crobinso/libvirt,eskultety/libvirt,eskultety/libvirt,eskultety/libvirt,andreabolognani/libvirt,olafhering/libvirt