8347302: Update ProcessTools.java to support virtual test factory for Xbootclasspath/a:

[lmesnik]

Test
runtime/cds/appcds/jigsaw/modulepath/OptimizeModuleHandlingTest.java
uses
-Xbootclasspath/a: classpath
(2 arguments)

Such usage of options -Xbootclasspath/a: should be correctly processed by virtual thread factory support in ProcessTools.

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
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Integration blocker

 ⚠️ Title mismatch between PR and JBS for issue JDK-8347302

Issue

• JDK-8347302: Mark test tools/jimage/JImageToolTest.java as flagless (Enhancement - P4) ⚠️ Title mismatch between PR and JBS.

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[mlbridge]

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[dholmes-ora]

@lmesnik looks like you used the wrong bugid in this PR.

[dholmes-ora]

-Xbootclasspath/a: does not accept a space between the ":" and the path! It should only be a single argument, not a double one.

[dholmes-ora]

Note that in the test runtime/cds/appcds/jigsaw/modulepath/OptimizeModuleHandlingTest.java the cases with a space are expected to fail.