syntax-check: fix sc-prohibit-cross-inclusion
syntax-check: fix sc-prohibit-cross-inclusion

Using '^' in in_vc_files assumes the build is happening
in srcdir, which is no longer possible as of:
commit f96395e78eaccffbf128336382c74b1250f04032

Signed-off-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>
Reviewed-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

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