Fix turbine classpath arguments

We were passing "--classpath foo.jar --classpath bar.jar" to turbine,
it now wants (and may always have expected?)
"--classpath foo.jar bar.jar".

Test: m checkbuild
Change-Id: Ib7e0ca64a34e236110f7b785d6a0fb51ed75567e
diff --git a/java/kotlin.go b/java/kotlin.go
index aa65314..5319a4f 100644
--- a/java/kotlin.go
+++ b/java/kotlin.go
@@ -133,7 +133,7 @@
 	deps = append(deps, srcJars...)
 	deps = append(deps, flags.processorPath...)
 
-	kaptProcessorPath := flags.processorPath.FormTurbineClasspath("-P plugin:org.jetbrains.kotlin.kapt3:apclasspath=")
+	kaptProcessorPath := flags.processorPath.FormRepeatedClassPath("-P plugin:org.jetbrains.kotlin.kapt3:apclasspath=")
 
 	kaptProcessor := ""
 	if flags.processor != "" {