support : Avoid circular depedency in apicheck rule.

Place stubs in a separate directory. The top-level src/ directory
is scanned for java files during droid-doc invocations so there's
a risk that previously generated stubs will be included in the list
of sources.

Change-Id: I9054b4efdd6fd7d30e9e5adc9cd44d8a2758aac5
1 file changed