touch_noise_filter: use LDFLAGS insteat of LINK_FLAGS

When I build touch_noise_filter with additional global LDFLAGS,
I found it does not take the LDFLAGS, this patch fixes this issue.

BUG=None
TEST=emerge-lumpy touch_noise_filter passes.

Change-Id: Idfc99952506b9ab6a136bf67bb8a773d4b92bd75
Reviewed-on: https://gerrit.chromium.org/gerrit/60435
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Commit-Queue: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
1 file changed