.mailmap: Add entries for inconsistent users

Where the same user had multiple entries, I mostly went with whichever
entry had the most non-merge commits.  Before this commit:

  $ git shortlog -se --no-merges
      ...
       5  Mrunal Patel <[email protected]>
      81  Mrunal Patel <[email protected]>
      ...
       1  Wang Qilin <[email protected]>
       5  Wang Qilin <[email protected]>
       8  liang chenye <[email protected]>
       8  liangchenye <[email protected]>
      ...
       1  梁辰晔 (Liang Chenye) <[email protected]>

With Liang, I went with the version that also included the logograms,
because logograms are cool and it matches his GitHub name [1] ;).

The order is alphabetical according to Emacs' sort-lines ;).

Details on the format in git-shortlog(1).

[1]: https://github.com/liangchenye

Signed-off-by: W. Trevor King <[email protected]>

Author: wking

.mailmap

@@ -0,0 +1,4 @@
+LinZhinan(Zen Lin) <[email protected]>
+Mrunal Patel <[email protected]> <[email protected]>
+Wang Qilin <[email protected]> <[email protected]>
+梁辰晔 (Liang Chenye) <[email protected]>