Start deprecating OVERRIDE_BUILT_MODULE_PATH

We no longer need to use $PRODUCT_OUT/obj/lib as a linker path, we can
directly specify the shared libraries to the linker.

So install both into the standard built module path, and declare a copy
rule to the old OVERRIDE_BUILT_MODULE_PATH location. This way we can
incrementally move users from the old location to the standard path.

Test: m -j
Change-Id: I3c6140ac26e5e5ca486337ce0192e15e530da32c
Merged-In: I3c6140ac26e5e5ca486337ce0192e15e530da32c