8202052: Disable warnings when building libawt with VS2017
Reviewed-by: erikj, prr
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cw has super hashCode(): true
cw has super equals(): true
cw has no super getClass(): true
cw has no super wait(): true
r has no super run(): true
r has super hashCode(): true
r has super equals(): true
r has no super getClass(): true
r has no super wait(): true