[TableGen] Add a space between type and '*' in front of a variable name in output file. While there replace type with 'auto' since there's a cast on the right side of the assignment. NFC
[TableGen] Add a space between type and '*' in front of a variable name in output file. While there replace type with 'auto' since there's a cast on the right side of the assignment. NFC

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@249980 91177308-0d34-0410-b5e6-96231b3b80d8

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