add `mcu3` changes
@@ -23,6 +23,15 @@ Added
- Relative-Phase Toffoli gates `rccx` (with 2 controls) and `rcccx`
(with 3 controls).
+- Multi-controlled rotation gates `mcrx`, `mcry`, and `mcrz` as a general
+ `u3` gate is not supported by graycode implementation of multi-controlled
+ rotation gates
+
+Removed
+-------
+
+- General multi-controlled rotation gate `mcu3` is replaced by
+ multi-controlled rotation gates `mcrx`, `mcry`, and `mcrz`
[0.5.1](https://github.com/Qiskit/qiskit-aqua/compare/0.5.0...0.5.1) - 2019-05-24
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