Change install paths of libs in sanitize builds

This changes the paths for partitions modules inside the 'asan'
subdirectory to match those used when not making sanitized builds.

This fixes get_non_asan_path macro, which just strips the 'asan' dir
from the lib paths.

For example, on a device without a product partition, previously
libraries would install install in:
- out/target/product/x/asan/product/lib[64]/y.so (with SANITIZE_TARGET)
- out/target/product/x/system/product/lib[64]/y.so (no SANITIZE TARGET)

Stripping the asan dir would look for the lib in out/.../<x>/product/,
which didn't exist. The new path for SANITIZE_TARGET builds is now
out/target/product<x>/asan/system/product/lib[64]/<y>.so

Bug: 117089649
Test: m; SANITIZE_TARGET=address m (for a device without /product)
Change-Id: Id663c5f284e3b4fc65ed8cb8c2da6bcf6542e034