In configure.ac, graphviz_collection is expected to have a value of
'stable' or 'development', but the value 'test' is assigned in
autogen.sh. This commit changes that value to development.
dnl NB: the next line gets changed to a date/time string for development releases
m4_define(graphviz_version_micro, $GRAPHVIZ_VERSION_DATE)
m4_define(graphviz_version_date, $GRAPHVIZ_VERSION_DATE)
-m4_define(graphviz_collection, test)
+m4_define(graphviz_collection, development)
m4_define(graphviz_version_commit, $GRAPHVIZ_VERSION_COMMIT)
EOF