Support boolean value annotations

[astral303]

This fixes the error where, currently, when referencing annotations with boolean values, the compiler crashes with:

org.codehaus.jdt.groovy.internal.compiler.ast.GroovyEclipseBug: NYI for signature Z
	at org.codehaus.jdt.groovy.internal.compiler.ast.JDTAnnotationNode.createExpressionFor(JDTAnnotationNode.java:157)
	at org.codehaus.jdt.groovy.internal.compiler.ast.JDTAnnotationNode.ensureMembersInitialized(JDTAnnotationNode.java:114)
	at org.codehaus.jdt.groovy.internal.compiler.ast.JDTAnnotationNode.getMembers(JDTAnnotationNode.java:74)
	at org.codehaus.groovy.ast.tools.GeneralUtils.hasClosureMember(GeneralUtils.java:444)
	at org.codehaus.groovy.ast.tools.GeneralUtils.copyAnnotatedNodeAnnotations(GeneralUtils.java:243)
	at org.codehaus.groovy.transform.trait.TraitComposer.createForwarderMethod(TraitComposer.java:361)
	at org.codehaus.groovy.transform.trait.TraitComposer.applyTrait(TraitComposer.java:176)
	at org.codehaus.groovy.transform.trait.TraitComposer.doExtendTraits(TraitComposer.java:111)
	at org.codehaus.groovy.control.CompilationUnit$11.call(CompilationUnit.java:215)
	at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1139)```

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[eric-milles]

Thanks for the submission. I reworked your changes a bit to support all primitive types.

[ispringer]

@eric-milles, any chance you can do a 2.4.17-02 release that includes this fix?

[eric-milles]

https://bintray.com/groovy/maven/groovy-eclipse-batch/2.4.17-02

Testing it some more locally before publishing and synching with Maven Central.