NFC: Add a directory to .gitignore
diff --git a/llvm-external-projects/iree-compiler-api/.gitignore b/llvm-external-projects/iree-compiler-api/.gitignore
index a0f5f9d..381498f 100644
--- a/llvm-external-projects/iree-compiler-api/.gitignore
+++ b/llvm-external-projects/iree-compiler-api/.gitignore
@@ -1,3 +1,4 @@
 /build/
+/build_intree/
 /wheels/
 /*.egg-info/