rename lpc_mapper_mock -> window_mapper_mock

Rename the mapper interface mock file.

Change-Id: Id502bf92f0eadc7d305d420f183c19c12981e728
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/test/lpc_mapper_mock.hpp b/test/window_mapper_mock.hpp
similarity index 100%
rename from test/lpc_mapper_mock.hpp
rename to test/window_mapper_mock.hpp