Reviewed-by: tbell, ohair, dholmes

Summary: Added configure params
Reviewed-by: ohair

8004490: build-infra: mac: hotspot is always built in product, regardless of --with-debug-level setting
Reviewed-by: tbell

Reviewed-by: ohair, tbell

Summary: Fix path sep variable
Reviewed-by: tbell

Reviewed-by: ohair

Summary: Added sanity check for file permissions in configure
Reviewed-by: tbell, ohair