RFR (XS) 8219583: Windows build failure after JDK-8214777 (Avoid some GCC 8.X strncpy() errors in HotSpot)

[Aleksey Shipilev]

Bug:
  https://bugs.openjdk.java.net/browse/JDK-8219583

Fix:
  http://cr.openjdk.java.net/~shade/8219583/webrev.02/

New code introduced in JDK-8214777 calls to "naked" snprintf, which fails to compile in my Windows
configs. It seems to be the omen to replace these with the usual jio_snprintf calls. There is also
os::snprintf we can use instead, but shared runtime code really likes jio_snprintf, and it will
delegate as needed.

Testing: Linux x86_64 build and hotspot tier1, Windows x86_64 build, jdk-submit (running)

Thanks,
-Aleksey