Reenable EcdhTest#testModifiedPublic

This test passes now, though testModifiedPublicSpec still doesn't due
to a bug fixed upstream in BoringSSL.

Bug: 36636626
Test: cts -m CtsLibcoreWycheproofConscryptTestCases
Change-Id: Ie7dd7c8a00a9fceffb6da09fac3b895acbfd5a69
1 file changed