[Bazel] Fixes 1f1ea1a (llvm#190971)

This fixes 1f1ea1a.

Co-authored-by: Google Bazel Bot <google-bazel-bot@google.com>

Author: forking-google-bazel-bot[bot]

utils/bazel/llvm-project-overlay/clang/BUILD.bazel

@@ -409,6 +409,16 @@ gentbl_cc_library(
     ],
 )
 
+gentbl_cc_library(
+    name = "basic_builtins_systemz_gen",
+    tbl_outs = {"include/clang/Basic/BuiltinsSystemZ.inc": ["-gen-clang-builtins"]},
+    tblgen = ":clang-tblgen",
+    td_file = "include/clang/Basic/BuiltinsSystemZ.td",
+    deps = [
+        ":BuiltinsBaseTdFiles",
+    ],
+)
+
 gentbl_cc_library(
     name = "basic_builtins_x86_gen",
     tbl_outs = {"include/clang/Basic/BuiltinsX86.inc": ["-gen-clang-builtins"]},
@@ -747,6 +757,7 @@ cc_library(
         ":basic_builtins_spirv_cl_gen",
         ":basic_builtins_spirv_common_gen",
         ":basic_builtins_spirv_vk_gen",
+        ":basic_builtins_systemz_gen",
         ":basic_builtins_x86_64_gen",
         ":basic_builtins_x86_gen",
         ":basic_riscv_andes_vector_builtins_gen",