Add a bunch of files in my checkout to .gitignore

BUG=none
TBR=machenbach@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/296453020

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21451 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

.gitignore

@@ -30,6 +30,8 @@
 bsuite
 d8
 d8_g
+gccauses
+gcsuspects
 shell
 shell_g
 /_*
@@ -49,12 +51,15 @@ shell_g
 /test/benchmarks/sunspider
 /test/mozilla/CHECKED_OUT_VERSION
 /test/mozilla/data
+/test/mozilla/data.old
 /test/mozilla/downloaded_*
 /test/promises-aplus/promises-tests
 /test/promises-aplus/promises-tests.tar.gz
 /test/promises-aplus/sinon
 /test/test262/data
+/test/test262/data.old
 /test/test262/tc39-test262-*
+/test/test262/test262-*
 /third_party
 /tools/jsfunfuzz
 /tools/jsfunfuzz.zip