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/cc/fuzz.go b/cc/fuzz.go
index dfefc11..0f709c9 100644
--- a/cc/fuzz.go
+++ b/cc/fuzz.go
@@ -398,7 +398,9 @@
 		}
 
 		hostOrTargetString := "target"
-		if ccModule.Host() {
+		if ccModule.Target().HostCross {
+			hostOrTargetString = "host_cross"
+		} else if ccModule.Host() {
 			hostOrTargetString = "host"
 		}