[llvm] lit_test : check if there is already a deps key in kwargs (PR #87290)

[Abhinav Gunjal via llvm-commits]

https://github.com/abhigunj created https://github.com/llvm/llvm-project/pull/87290

This change checks if there is already a deps key in kwargs and concatenate it to avoid multiple values for  'deps' key argument.

background:
https://github.com/llvm/llvm-project/pull/87022 recently added explicit `deps` to the lit_test. This is causing StableHLO bazel build failures  at https://github.com/openxla/stablehlo/actions/runs/8511888283/job/23312383380?pr=2147

>From 1b33d98179c3b6f71b6c0dca0edfa6df5d9f5630 Mon Sep 17 00:00:00 2001
From: Abhinav <agunjal at google.com>
Date: Mon, 1 Apr 2024 20:49:23 +0000
Subject: [PATCH] check if there is already a deps key in kwargs

---
 utils/bazel/llvm-project-overlay/llvm/lit_test.bzl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils/bazel/llvm-project-overlay/llvm/lit_test.bzl b/utils/bazel/llvm-project-overlay/llvm/lit_test.bzl
index f754a9fc7d5e48..b5cb9f375ebce6 100644
--- a/utils/bazel/llvm-project-overlay/llvm/lit_test.bzl
+++ b/utils/bazel/llvm-project-overlay/llvm/lit_test.bzl
@@ -35,7 +35,7 @@ def lit_test(
         args = args + ["-v"] + ["$(execpath %s)" % src for src in srcs],
         data = data + srcs,
         legacy_create_init = False,
-        deps = [Label("//llvm:lit")],
+        deps = [Label("//llvm:lit")] + kwargs.pop("deps", []),
         **kwargs
     )