Separate host and host cross fuzz packaging

Prevent collisions between host and host cross fuzz packaging when
both are supported as fuzz targets by using a different value for
hostOrTargetString.

Test: builds with HOST_CROSS_OS := linux_musl
Change-Id: I0e82bab2987899cece94c89eb8398d1733ebbd15
diff --git a/java/fuzz.go b/java/fuzz.go
index 4aa6dbf..e24594a 100644
--- a/java/fuzz.go
+++ b/java/fuzz.go
@@ -150,7 +150,9 @@
 		}
 
 		hostOrTargetString := "target"
-		if javaFuzzModule.Host() {
+		if javaFuzzModule.Target().HostCross {
+			hostOrTargetString = "host_cross"
+		} else if javaFuzzModule.Host() {
 			hostOrTargetString = "host"
 		}