Some toolchains need -no-pie to build all tests, others do not support
the -no-pie flag at all.  Therefore, add another test for the
availability of the flag.

This amends commit 3346a6a4
("selftests: x86: sysret_ss_attrs doesn't build on a PIE build").
Signed-off-by: NFlorian Weimer <fweimer@redhat.com>
Acked-by: NRandy Dunlap <rdunlap@infradead.org>
Tested-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NShuah Khan (Samsung OSG) <shuah@kernel.org>