Pass "-lexecinfo" for some TensorFlow targets on FreeBSD.

tensorflow/BUILD

@@ -497,6 +497,10 @@ tf_cc_shared_object(
     linkopts = select({
         "//tensorflow:macos": [],
         "//tensorflow:windows": [],
+        "//tensorflow:freebsd": [
+            "-Wl,--version-script,$(location //tensorflow:tf_framework_version_script.lds)",
+            "-lexecinfo"
+        ],
         "//conditions:default": [
             "-Wl,--version-script,$(location //tensorflow:tf_framework_version_script.lds)",
         ],

tensorflow/compiler/xla/BUILD

@@ -165,6 +165,10 @@ cc_library(
         "statusor.h",
     ],
     visibility = ["//visibility:public"],
+    linkopts = select({
+        "@org_tensorflow//tensorflow:freebsd": ["-lexecinfo"],
+        "//conditions:default": []
+    }),
     deps = [
         ":status",
         "//tensorflow/stream_executor/lib",