adb: Pick desired product value from command line it follows -p

Change-Id: Ic9fb74c99c88479addf3a2cc599b8492ced759d8
diff --git a/adb/commandline.c b/adb/commandline.c
index ffc120f..a7f6816 100644
--- a/adb/commandline.c
+++ b/adb/commandline.c
@@ -878,7 +878,7 @@
                 argc--;
                 argv++;
             } else {
-                product = argv[1] + 2;
+                product = argv[0] + 2;
             }
             gProductOutPath = find_product_out_path(product);
             if (gProductOutPath == NULL) {