libeffects: Add sinesweepraw.raw

CTS no longer contains sinesweepraw.raw in the repository.
Added the file to media/libeffects/res/raw and updated
the test scripts in libeffects to refer new path

Test: downmix/tests/build_and_run_all_unit_tests.sh
Test: lvm/tests/build_and_run_all_unit_tests_reverb.sh
Test: lvm/tests/build_and_run_all_unit_tests.sh

Change-Id: I46a4746ae5c7644ec86680757d6353290fcac4e4