libxl: do not use G_REGEX_EXTENDED
libxl: do not use G_REGEX_EXTENDED

This flag is not needed to use extended regular expression syntax
with GRegex and it makes GRegex ignore whitespace in the regex.

Remove the unintended usage, even though it should not matter in this
case.

Signed-off-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>
Reviewed-by: Peter Krempa <2cf5c04c61aa466e4a47bfedc747d17279c72ffc@redhat.com>

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