Fix typo in CMakeLists.txt
Fix typo in CMakeLists.txt

- this re-enables CMAKE_EXPORT_COMPILE_COMMANDS

Change-Id: Ic092468579892f38efb3425394613e1e9c66acd7
Reviewed-on: http://gerrit.cloudera.org:8080/1586
Reviewed-by: Lars Volker <4d73c29a4561048ce85fa0051bb7a6d201781159@cloudera.com>
Tested-by: Internal Jenkins

kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala