[bazel] Add BuiltinsSPIRV (for #121598)

Author: chapuni

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

@@ -341,6 +341,21 @@ gentbl(
     ],
 )
 
+gentbl(
+    name = "basic_builtins_spirv_gen",
+    tbl_outs = [(
+        "-gen-clang-builtins",
+        "include/clang/Basic/BuiltinsSPIRV.inc",
+    )],
+    tblgen = ":clang-tblgen",
+    td_file = "include/clang/Basic/BuiltinsSPIRV.td",
+    td_srcs = [
+        "include/clang/Basic/Builtins.td",
+        "include/clang/Basic/BuiltinsBase.td",
+        "include/clang/Basic/BuiltinsSPIRV.td",
+    ],
+)
+
 gentbl(
     name = "basic_builtins_riscv_gen",
     tbl_outs = [(
@@ -723,6 +738,7 @@ cc_library(
         ":basic_builtins_bpf_gen",
         ":basic_builtins_gen",
         ":basic_builtins_riscv_gen",
+        ":basic_builtins_spirv_gen",
         ":basic_builtins_x86_gen",
         ":basic_builtins_x86_64_gen",
         ":basic_internal_headers",