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/dex.go b/java/dex.go
index c8a4fa8..5b25b21 100644
--- a/java/dex.go
+++ b/java/dex.go
@@ -85,8 +85,8 @@
 func (j *Module) d8Flags(ctx android.ModuleContext, flags javaBuilderFlags) ([]string, android.Paths) {
 	d8Flags := j.dexCommonFlags(ctx)
 
-	d8Flags = append(d8Flags, flags.bootClasspath.FormTurbineClasspath("--lib ")...)
-	d8Flags = append(d8Flags, flags.classpath.FormTurbineClasspath("--lib ")...)
+	d8Flags = append(d8Flags, flags.bootClasspath.FormRepeatedClassPath("--lib ")...)
+	d8Flags = append(d8Flags, flags.classpath.FormRepeatedClassPath("--lib ")...)
 
 	var d8Deps android.Paths
 	d8Deps = append(d8Deps, flags.bootClasspath...)