Disable -Wframe-larger-than when building SANITIZE_TARGET.

The same has been done for SANITIZE_HOST some time ago.
AddressSanitizer adds redzones around local variables, increasing
function frame size by 2x to 3x.

Bug: 21785137
Change-Id: If53456894a2e6e38318b681dbc69547b05b6f33c