excluse some files

Former-commit-id: 5b1b5b4c5d31d2915573c26d8438f7382cabbeca

cpp/build-support/lint_exclusions.txt

@@ -4,3 +4,4 @@
 *src/thirdparty*
 *src/core/thirdparty*
 *src/grpc*
+*easylogging++*
\ No newline at end of file

cpp/build-support/run_cpplint.py

@@ -84,7 +84,7 @@ if __name__ == "__main__":
     cmd = [
         arguments.cpplint_binary,
         '--verbose=2',
-        '--linelength=90',
+        '--linelength=120',
         '--filter=' + ','.join(_filters)
     ]
     if (arguments.cpplint_binary.endswith('.py') and