build: aux: Fix link type checking for AUX builds
AUX build environent is volatile and is only instantiated in
a context of AUX-aware module.
link-type checking is happening outside such context, and
is not able to correctly determine AUX build dependencies.
1. Save enough of context in LINK_TYPE variable;
Use AUX-<variant-name> instead of AUX
2. Load correct set of AUX meta build vars before
building link_type rules
Bug: 62060489
Test: make auxiliary
build no longer tries to access "/STATIC_LIBRARIES" path
Change-Id: I9764d4a0740da1c55a6f8429398872fc4362942c
2 files changed