Fix run_gamecore.sh

Test: run run_gamecore.sh --apk-dir testcases
Change-Id: Ib57211d0b6fa04acc999efd87f033de0784fbe2b
diff --git a/dist/run_gamecore.sh b/dist/run_gamecore.sh
index b8cac8a..c8a8fcb 100755
--- a/dist/run_gamecore.sh
+++ b/dist/run_gamecore.sh
@@ -1,3 +1,2 @@
 #!/bin/sh
-ANDROID_TARGET_OUT_TESTCASES=$PWD/testcases
-./bin/tradefed.sh run commandAndExit AndroidTest.xml "$@"
+ANDROID_TARGET_OUT_TESTCASES=$PWD/testcases ./bin/tradefed.sh run commandAndExit AndroidTest.xml "$@"