RFR (S): 8044735: Print format/argument warnings

[Mikael Vidstedt]

Please review this small change which addresses some (additional) printf 
format/argument mismatch warnings when compiling sparc files with gcc. A 
previous change (JDK-8044071) fixed it for the product version of 
Hotspot. This time around it's for warnings when compiling the debug 
version(s).

Bug: https://bugs.openjdk.java.net/browse/JDK-8044735
Webrev: http://cr.openjdk.java.net/~mikael/webrevs/8044735/webrev.01/webrev/

Cheers,
Mikael