Native test infra groups individual tests into compilations, so it
renames packages, patching package and import directives, to avoid
clashes.
This doesn't include "standard" packages. They are distinguished by a
predicate defined in the test infra. This predicate didn't include
`objcnames.*` -- synthetic package provided by the compiler.
As a result, tests importing from `objcnames.*` got those import
directives patched, which was unexpected and could make tests fail.
This commit fixes the problem, making `objnames.*` recognized as
a "standard" package.
Svyatoslav Scherbina
59142b3051