rpm,deb: add missing python lxml dependency

Dom0 have this package installed anyway, but it is missing in VM.

debian/control

@@ -34,6 +34,7 @@ Package: python-qubesadmin
 Architecture: any
 Depends:
  python-docutils,
+ python-lxml,
  ${python:Depends},
 Provides:
  ${python:Provides},
@@ -44,6 +45,7 @@ Package: python3-qubesadmin
 Architecture: any
 Depends:
  python3-docutils,
+ python3-lxml,
  ${python3:Depends},
 Description: Python 3 bindings for Qubes Admin API
  Python 3 client side module for Qubes Admin API

rpm_spec/qubes-core-admin-client.spec

@@ -35,6 +35,7 @@ This package include managemt tools, like qvm-*.
 Summary:    Python2 module qubesadmin
 Requires:   python-daemon
 Requires:   python-docutils
+Requires:   python2-lxml
 
 %description -n python2-qubesadmin
 Python2 module qubesadmin.
@@ -44,6 +45,7 @@ Python2 module qubesadmin.
 Summary:    Python34 module qubesadmin
 Requires:   python-daemon
 Requires:   python34-docutils
+Requires:   python34-lxml
 Conflicts:  qubes-manager < 4.0.6
 
 %description -n python34-qubesadmin
@@ -53,6 +55,7 @@ Python34 module qubesadmin.
 Summary:    Python3 module qubesadmin
 Requires:   python3-daemon
 Requires:   python3-docutils
+Requires:   python3-lxml
 Conflicts:  qubes-manager < 4.0.6
 
 %description -n python3-qubesadmin