hg: portola/portola/hotspot: Use isnan instead of isnanf

[mikael.vidstedt at oracle.com]

Changeset: b643cbade748
Author:    mikael
Date:      2017-04-11 16:04 -0700
URL:       http://hg.openjdk.java.net/portola/portola/hotspot/rev/b643cbade748

Use isnan instead of isnanf

! src/share/vm/utilities/globalDefinitions_gcc.hpp