Use addFlag to add the enum class attribute.

This has the side effect of using DW_FORM_flag_present on dwarf4 and above.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191991 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/DebugInfo/X86/enum-class.ll b/test/DebugInfo/X86/enum-class.ll
index 8b2fbb7..96aefe2 100644
--- a/test/DebugInfo/X86/enum-class.ll
+++ b/test/DebugInfo/X86/enum-class.ll
@@ -30,12 +30,12 @@
 
 ; CHECK: DW_TAG_enumeration_type [3]
 ; CHECK: DW_AT_type [DW_FORM_ref4]
-; CHECK: DW_AT_enum_class [DW_FORM_flag]    (0x01)
+; CHECK: DW_AT_enum_class [DW_FORM_flag_present] (true)
 ; CHECK: DW_AT_name [DW_FORM_strp]      ( .debug_str[{{.*}}] = "A")
 
 ; CHECK: DW_TAG_enumeration_type [3] *
 ; CHECK: DW_AT_type [DW_FORM_ref4]
-; CHECK: DW_AT_enum_class [DW_FORM_flag]    (0x01)
+; CHECK: DW_AT_enum_class [DW_FORM_flag_present] (true)
 ; CHECK: DW_AT_name [DW_FORM_strp]          ( .debug_str[{{.*}}] = "B")
 
 ; CHECK: DW_TAG_enumeration_type [6]