Allow playground tests to run on device

(cherry picked from commit da93bc5)

Author: fredriss

lldb/packages/Python/lldbsuite/test/lldbplaygroundrepl.py

@@ -56,6 +56,8 @@ def repl_set_up(self):
         target = self.dbg.CreateTarget(exe)
         self.assertTrue(target, VALID_TARGET)
 
+        self.registerSharedLibrariesWithTarget(target, ['libPlaygroundsRuntime.dylib'])
+
         # Set the breakpoints
         breakpoint = target.BreakpointCreateBySourceRegex(
             'Set breakpoint here', self.PlaygroundStub_source_spec)