Make sure sine: is supported again in stagefright commandline tool.

Change-Id: I703f1a8b7556543ef71b141dc8e38d8b82d8c6dc
diff --git a/cmds/stagefright/stagefright.cpp b/cmds/stagefright/stagefright.cpp
index e2ad9e6..877b908 100644
--- a/cmds/stagefright/stagefright.cpp
+++ b/cmds/stagefright/stagefright.cpp
@@ -483,7 +483,7 @@
 
         sp<DataSource> dataSource = DataSource::CreateFromURI(filename);
 
-        if (dataSource == NULL) {
+        if (strncasecmp(filename, "sine:", 5) && dataSource == NULL) {
             fprintf(stderr, "Unable to create data source.\n");
             return 1;
         }