Rename Bazel-specific BUILD files to BUILD.bazel

PiperOrigin-RevId: 452228915
diff --git a/bazel/llvm_project/clang/BUILD b/bazel/llvm_project/clang/BUILD.bazel
similarity index 100%
rename from bazel/llvm_project/clang/BUILD
rename to bazel/llvm_project/clang/BUILD.bazel
diff --git a/bazel/llvm_project/llvm/BUILD b/bazel/llvm_project/llvm/BUILD.bazel
similarity index 100%
rename from bazel/llvm_project/llvm/BUILD
rename to bazel/llvm_project/llvm/BUILD.bazel