message: Add guard for SystemZCodeGen dependency
diff: @@ -71,9 +71,14 @@ cc_library(
  "@llvm-project//llvm:PowerPCCodeGen", # fixdeps: keep
  "@llvm-project//llvm:Target",
  "@llvm-project//llvm:X86CodeGen", # fixdeps: keep
  - "@llvm-project//llvm:SystemZCodeGen", # fixdeps: keep
  "//tensorflow/core:regexp_internal",
  - ] + if_llvm_aarch64_available([
  + ] + select({
  + "//tensorflow:linux_s390x": [
  + "@llvm-project//llvm:SystemZCodeGen", # fixdeps: keep
  + ],
  + "//conditions:default": [
  + ],
  + }) + if_llvm_aarch64_available([
  "@llvm-project//llvm:AArch64CodeGen", # fixdeps: keep
  ]),
  )
  @@ -114,8 +119,13 @@ cc_library(
  "@llvm-project//llvm:PowerPCCodeGen", # fixdeps: keep
  "@llvm-project//llvm:Target",
  "@llvm-project//llvm:X86CodeGen", # fixdeps: keep
  + ] + select({
  + "//tensorflow:linux_s390x": [
  "@llvm-project//llvm:SystemZCodeGen", # fixdeps: keep
  - ] + if_llvm_aarch64_available([
  + ],
  + "//conditions:default": [
  + ],
  + }) + if_llvm_aarch64_available([
  "@llvm-project//llvm:AArch64CodeGen", # fixdeps: keep
  ]),
  )
  