Add iOS 14.4. (From Xcode_12.4_Release_Candidate.xip)

Author: lachlanbell

DeviceSupport/14.4(FromXcode_12.4_Release_Candidate_xip).zip

@@ -118,6 +118,7 @@ optional arguments:
    * 14.2 (FromXcode_12.3_beta_xip) `2020/11/20`
    * 14.3 (FromXcode_12.3_beta_xip) `2020/11/20`
    * 14.3 (FromXcode_12.3_Release_Candidate_xip) `2020/12/09`
+   * 14.4 (FromXcode_12.4_Release_Candidate_xip) `2021/01/27`
 
 
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