ASoC: change OUT_DIR to PRODUCT_OUT for wcd9360

OUT_DIR folder doesn't point to the right out folder. It would
not delete the right Module.symvers for wcd9360.
Change OUT_DIR to PRODUCT_OUT to delete the right wcd9360 module
symbol.

Change-Id: I6ad376e1cad8416d8eefeefe41e0933813d64997
Signed-off-by: Meng Wang <mwang@codeaurora.org>