[lmi] Can xmlwrapp's documentation be disabled?

[Greg Chicares]

On an msw-10 laptop with cygwin, we encounter errors building the
xmlwrapp documentation (because 'graphviz' is not installed).
This isn't a fatal error, and everything else works, so it's not
urgent. I'm just wondering whether there's a way to suppress it.

We configure with the '--disable-docs' parameter, but it looks
like lmi's 'install_xml_libraries.sh' script runs 'bootstrap'
before 'configure':

+ cd /opt/lmi/src/lmi/third_party/xmlwrapp
+ ./bootstrap
Setting up build system for xmlwrapp:
 - aclocal 
[...]
 - doxygen 
sh: dot: command not found
error: Problems running dot: exit code=127, command='dot', 
arguments='"/opt/lmi/src/lmi/third_party/xmlwrapp/docs/html/attributes_8h__incl.dot"
 -Tpng -o 
"/opt/lmi/src/lmi/third_party/xmlwrapp/docs/html/attributes_8h__incl.png"'
[...]
error: problems opening map file 
/opt/lmi/src/lmi/third_party/xmlwrapp/docs/html/inherit_graph_26.m
ap for inclusion in the docs!
If you installed Graphviz/dot after a previous failing run, 
try deleting the output directory and rerun doxygen.

...and it is only later, after many such error messages, that
'configure' is called. Is there a convenient way either to tell
'bootstrap' to skip building the documentation, or to move the
documentation to a later step so that '--disable-docs' disables it?