Revert inadvertant update of ADOdb submodule

Beware of 'git add .' :-(
Update ADOdb to 5.19
db_query_bound() $arr_parms defaults to false instead of null

This is is to align the parameter's type to what ADOdb expects - in
v5.19 the Execute() method was modified to perform a strict type check
on the parameter, causing database errors when it receives 'null' if
there are no parameters to the query being executed.

Fixes #13713
oci8 no longer needs special fetch mode with ADOdb 5.19

Fixes #15426