fix linux dependency test

As title

Author: esc

llvmlite/tests/test_binding.py

@@ -718,7 +718,7 @@ def test_linux(self):
             self.fail("failed parsing dependencies? got %r" % (deps,))
         # Ensure all dependencies are expected
         allowed = set(['librt', 'libdl', 'libpthread', 'libz', 'libm',
-                       'libgcc_s', 'libc', 'ld-linux', 'ld64'])
+                       'libgcc_s', 'libc', 'ld-linux', 'ld64', 'libzstd'])
         if platform.python_implementation() == 'PyPy':
             allowed.add('libtinfo')