Add tools/test/graphicsbenchmark to manifest

Fixes: 76160023

default.xml

@@ -684,6 +684,7 @@
   <project path="tools/studio/cloud" name="platform/tools/studio/cloud" groups="notdefault,tools" />
   <project path="tools/swt" name="platform/tools/swt" groups="notdefault,tools" />
   <project path="tools/test/connectivity" name="platform/tools/test/connectivity" groups="pdk" />
+  <project path="tools/test/graphicsbenchmark" name="platform/tools/test/graphicsbenchmark" groups="pdk" />
   <project path="tools/tradefederation/core" name="platform/tools/tradefederation" groups="pdk,tradefed" />
   <project path="tools/tradefederation/contrib" name="platform/tools/tradefederation/contrib" groups="pdk,tradefed" />