[9] RFR (XXS): 8132168: PrintIdealGraphLevel range should be [0..4]

[Roland Westrelin]

> http://cr.openjdk.java.net/~vlivanov/8132168/webrev.00/
> https://bugs.openjdk.java.net/browse/JDK-8132168
> 
> PrintIdealGraphLevel=4 is used to dump IR during parsing (see parse2.cpp:2387).

Ok. Do we want to update the description string:

 369           "Level of detail of the ideal graph printout. "                   \
 370           "System-wide value, 0=nothing is printed, 3=all details printed. "\
 371           "Level of detail of printouts can be set on a per-method level "  \
 372           "as well by using CompileCommand=option.”)        

to cover the “4” case?

Roland.