[OutputSection] Set the symbolic bit in DT_FLAGS and not DT_FLAGS_1.

The two names are similar enough that they might lead to confusion.
The output of readobj clarifies but I missed it when I originally
committed this. Found while linking FreeBSD userland with lld.

llvm-svn: 250739
diff --git a/lld/ELF/OutputSections.cpp b/lld/ELF/OutputSections.cpp
index 1775562..8066070 100644
--- a/lld/ELF/OutputSections.cpp
+++ b/lld/ELF/OutputSections.cpp
@@ -369,6 +369,9 @@
   uint32_t Flags = 0;
   if (Config->Bsymbolic)
     Flags |= DF_SYMBOLIC;
+  if (Flags)
+    WriteVal(DT_FLAGS, Flags);
+  Flags = 0;
   if (Config->ZNow)
     Flags |= DF_1_NOW;
   if (Flags)
diff --git a/lld/test/elf2/dt_flags.s b/lld/test/elf2/dt_flags.s
index b98149d..906c379 100644
--- a/lld/test/elf2/dt_flags.s
+++ b/lld/test/elf2/dt_flags.s
@@ -2,17 +2,19 @@
 
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
 # RUN: ld.lld2 -shared %t -o %t.so
-# RUN: ld.lld2 -z now -Bsymbolic %t %t.so -o %t1
+# RUN: ld.lld2 -z now -z nodelete -Bsymbolic %t %t.so -o %t1
 # RUN: ld.lld2 %t %t.so -o %t2
 # RUN: llvm-readobj -dynamic-table %t1 | FileCheck -check-prefix=FLAGS %s
 # RUN: llvm-readobj -dynamic-table %t2 | FileCheck %s
 
 # FLAGS: DynamicSection [
-# FLAGS:   0x000000006FFFFFFB FLAGS_1 NOW GLOBAL
+# FLAGS:   0x000000000000001E FLAGS SYMBOLIC
+# FLAGS:   0x000000006FFFFFFB FLAGS_1 NOW
 # FLAGS: ]
 
 # CHECK: DynamicSection [
-# CHECK-NOT:   0x000000006FFFFFFB FLAGS_1 NOW GLOBAL
+# CHECK-NOT:   0x000000000000001E FLAGS SYMBOLIC
+# CHECK-NOT:   0x000000006FFFFFFB FLAGS_1 NOW
 # CHECK: ]
 
 .globl _start