Enable -fsanitize=function on FreeBSD.

llvm-svn: 331440
diff --git a/clang/lib/Driver/ToolChains/FreeBSD.cpp b/clang/lib/Driver/ToolChains/FreeBSD.cpp
index b570245..ef1b647 100644
--- a/clang/lib/Driver/ToolChains/FreeBSD.cpp
+++ b/clang/lib/Driver/ToolChains/FreeBSD.cpp
@@ -399,6 +399,7 @@
     Res |= SanitizerKind::Thread;
   }
   if (IsX86 || IsX86_64) {
+    Res |= SanitizerKind::Function;
     Res |= SanitizerKind::SafeStack;
     Res |= SanitizerKind::Fuzzer;
     Res |= SanitizerKind::FuzzerNoLink;