Refactoring fuzz packaging code

Rust and cc fuzz packaging have common. This change is to put this
common methods and fields into fuzz_common.

Test: make haiku and make haiku-rust ran locally and verify corpus,
dict and config are packaged along with the executable.

Change-Id: I04bf535cd2597ed8b2bd3d8e6ea8c28f38bdc18b
diff --git a/cc/Android.bp b/cc/Android.bp
index 46740dc..4b750ff 100644
--- a/cc/Android.bp
+++ b/cc/Android.bp
@@ -58,6 +58,7 @@
         "binary.go",
         "binary_sdk_member.go",
         "fuzz.go",
+        "fuzz_common.go",
         "library.go",
         "library_headers.go",
         "library_sdk_member.go",