More ignores

Change-Id: Ia855252b711cc20d96780b1880eb28ee29d90364
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/19360
Reviewed-by: dan sinclair <dsinclair@google.com>

.gitignore

diff --git a/.gitignore b/.gitignore
index 0e382d7..6d3242f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,10 +1,15 @@
+.cipd
 .DS_Store
 .gclient
 .gclient_entries
 .vscode
 build
+buildtools
 out
 third_party/cpplint
+third_party/binutils
 third_party/googletest
+third_party/llvm-build
 third_party/spirv-headers
 third_party/spirv-tools
+tools/clang