Update .gitignore

During running the tests, two files are generated

I believe they should be added to .gitignore, so they are not committed by mistake.

Author: asashour

.gitignore

@@ -26,6 +26,7 @@ out
 cpp/IEDriver/sizzle.h
 third_party/gecko-*
 cpp/iedriver/Generated/atoms.h
+cpp/iedriver/sizzle.h
 chromedriver.log
 junit*.properties
 WebDriver.suo
@@ -39,6 +40,7 @@ maven/*/src
 maven/target
 maven/*/target
 java/client/build/
+java/client/log.txt
 java/server/build/
 *.pyc
 dist/