ARROW-2996: [C++] Fix typo in cpp/.clang-tidy
ARROW-2996: [C++] Fix typo in cpp/.clang-tidy

There was a typo in the list of checks for clang-tidy. To my knowledge, none of the google/modernize/readablity[sic] checks were being run.

Author: Wan Shen Lim <wanshenl@andrew.cmu.edu>

Closes #2381 from lmwnshn/clangtidy and squashes the following commits:

dbbe0a6a <Wan Shen Lim> Fix typos in clang-tidy.

tebeka/arrow,apache/arrow,kou/arrow,pcmoritz/arrow,xhochy/arrow,apache/arrow,cpcloud/arrow,laurentgo/arrow,apache/arrow,wesm/arrow,xhochy/arrow,majetideepak/arrow,icexelloss/arrow,apache/arrow,pcmoritz/arrow,renesugar/arrow,cpcloud/arrow,tebeka/arrow,itaiin/arrow,wesm/arrow,cpcloud/arrow,itaiin/arrow,renesugar/arrow,tebeka/arrow,majetideepak/arrow,majetideepak/arrow,xhochy/arrow,apache/arrow,kou/arrow,pcmoritz/arrow,laurentgo/arrow,pcmoritz/arrow,wesm/arrow,xhochy/arrow,kou/arrow,majetideepak/arrow,apache/arrow,kou/arrow,kou/arrow,majetideepak/arrow,xhochy/arrow,itaiin/arrow,majetideepak/arrow,laurentgo/arrow,itaiin/arrow,apache/arrow,wesm/arrow,tebeka/arrow,wesm/arrow,majetideepak/arrow,majetideepak/arrow,renesugar/arrow,laurentgo/arrow,cpcloud/arrow,cpcloud/arrow,pcmoritz/arrow,icexelloss/arrow,cpcloud/arrow,icexelloss/arrow,tebeka/arrow,itaiin/arrow,wesm/arrow,wesm/arrow,pcmoritz/arrow,pcmoritz/arrow,laurentgo/arrow,majetideepak/arrow,laurentgo/arrow,majetideepak/arrow,xhochy/arrow,renesugar/arrow,renesugar/arrow,majetideepak/arrow,xhochy/arrow,pcmoritz/arrow,renesugar/arrow,cpcloud/arrow,laurentgo/arrow,itaiin/arrow,icexelloss/arrow,renesugar/arrow,xhochy/arrow,laurentgo/arrow,icexelloss/arrow,kou/arrow,pcmoritz/arrow,laurentgo/arrow,icexelloss/arrow,itaiin/arrow,icexelloss/arrow,cpcloud/arrow,apache/arrow,wesm/arrow,kou/arrow,wesm/arrow,wesm/arrow,majetideepak/arrow,xhochy/arrow,cpcloud/arrow,pcmoritz/arrow,xhochy/arrow,apache/arrow,laurentgo/arrow,majetideepak/arrow,pcmoritz/arrow,wesm/arrow,xhochy/arrow,icexelloss/arrow,tebeka/arrow,kou/arrow,xhochy/arrow,icexelloss/arrow,kou/arrow,icexelloss/arrow,laurentgo/arrow,apache/arrow,renesugar/arrow,renesugar/arrow,kou/arrow,xhochy/arrow,kou/arrow,majetideepak/arrow,itaiin/arrow,itaiin/arrow,apache/arrow,itaiin/arrow,apache/arrow,kou/arrow,renesugar/arrow,cpcloud/arrow,wesm/arrow,kou/arrow,tebeka/arrow,pcmoritz/arrow,cpcloud/arrow,tebeka/arrow,tebeka/arrow,icexelloss/arrow,laurentgo/arrow,renesugar/arrow,laurentgo/arrow,icexelloss/arrow,apache/arrow,renesugar/arrow,laurentgo/arrow,kou/arrow,pcmoritz/arrow,itaiin/arrow,wesm/arrow,xhochy/arrow,itaiin/arrow,xhochy/arrow,wesm/arrow,cpcloud/arrow,tebeka/arrow,itaiin/arrow,pcmoritz/arrow,cpcloud/arrow,pcmoritz/arrow,majetideepak/arrow,renesugar/arrow,icexelloss/arrow,itaiin/arrow,icexelloss/arrow,itaiin/arrow,renesugar/arrow,renesugar/arrow,laurentgo/arrow,cpcloud/arrow,apache/arrow