When SSL backends were broken out as plugins, various tests were
suppressed since the code they test is now in a plugin, no longer part
of the network libraries.
The ASN.1 test is, however, fairly self-contained, so just compile it
with the relevant plugin sources (which are likewise self-contained)
and brute-force the paths to line up for the test.
Task-number: QTBUG-46843
Change-Id: I778489e68b7361a7fd55c88d2a35257ad6a58c46
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
4f05ffeb41