cpplint: Cleanup errors

Cleanup errors from upstream cpplint in preparation
for moving art's cpplint fork to upstream tip-of-tree cpplint.

Test: cd art && mm
Bug: 68951293
Change-Id: I15faed4594cbcb8399850f8bdee39d42c0c5b956
diff --git a/compiler/driver/compiler_options.h b/compiler/driver/compiler_options.h
index ab2a681..a71f61a 100644
--- a/compiler/driver/compiler_options.h
+++ b/compiler/driver/compiler_options.h
@@ -30,7 +30,7 @@
 namespace art {
 
 namespace verifier {
-  class VerifierDepsTest;
+class VerifierDepsTest;
 }  // namespace verifier
 
 class DexFile;