[bazel] Fix build past aec87a2 (#110967)

Author: dklimkin

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

@@ -1598,6 +1598,18 @@ gentbl(
     td_srcs = [":omp_td_files"],
 )
 
+cc_library(
+    name = "FrontendAtomic",
+    hdrs = glob([
+        "include/llvm/Frontend/Atomic/*.h",
+    ]),
+    copts = llvm_copts,
+    deps = [
+        ":Support",
+        ":ir_headers",
+    ],
+)
+
 cc_library(
     name = "FrontendOpenMP",
     srcs = glob([
@@ -1618,6 +1630,7 @@ cc_library(
         ":BitReader",
         ":Core",
         ":Demangle",
+        ":FrontendAtomic",
         ":FrontendOffloading",
         ":MC",
         ":Scalar",