Replace "dummy" in libartbase/, libdexfile/, compiler/.

Test: m test-art-host-gtest
Bug: 161336379
Change-Id: I5335b28b1f66cdec39500563385bda99c580454d
diff --git a/compiler/linker/output_stream_test.cc b/compiler/linker/output_stream_test.cc
index 00231b1..f1af4cb 100644
--- a/compiler/linker/output_stream_test.cc
+++ b/compiler/linker/output_stream_test.cc
@@ -103,7 +103,7 @@
 TEST_F(OutputStreamTest, BufferedFlush) {
   struct CheckingOutputStream : OutputStream {
     CheckingOutputStream()
-        : OutputStream("dummy"),
+        : OutputStream("fake-location"),
           flush_called(false) { }
     ~CheckingOutputStream() override {}