RFR: 8267686: C2: PrintIdealGraphFile supports parameterization

[Yong Zhou]

When analyzing C2 problems in jcstress[1], which starts multiple JVMs.  If parsing %p%t is not supported, the file specified by PrintIdealGraphFile will be opened repeatedly.

Example

java -XX:-BackgroundCompilation -XX:-TieredCompilation -XX:CICompilerCount=1 -XX:PrintIdealGraphLevel=3 -XX:PrintIdealGraphFile=ideal-%p-%t.xml -XX:CompileCommand="print *jcstress::lambda$sanityCheck_Footprints$2" -jar jcstress.jar -c 64 -f 1 -iters 1 -t org.openjdk.jcstress.tests.locks.stamped.StampedLockPairwiseTests


Implemented by referring to `DumpLoadedClassList` 

[1] https://mail.openjdk.java.net/pipermail/jdk8u-dev/2021-January/013278.html

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Commit messages:
 - 8267686: C2: PrintIdealGraphFile supports parameterization

Changes: https://git.openjdk.java.net/jdk/pull/4201/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4201&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8267686
  Stats: 6 lines in 1 file changed: 4 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4201.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4201/head:pull/4201

PR: https://git.openjdk.java.net/jdk/pull/4201