Don't set the default architecture to x86_64. Leave it NULL so that it isn't set to anything and so that any single architecture binary will adopt that architecture instead of posting an error stating the binary doesn't contain "x86_64".

git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@117292 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Target/Target.cpp b/source/Target/Target.cpp
index 943fda4..488c6b8 100644
--- a/source/Target/Target.cpp
+++ b/source/Target/Target.cpp
@@ -1014,7 +1014,7 @@
 Target::SettingsController::global_settings_table[] =
 {
   //{ "var-name",    var-type  ,        "default", enum-table, init'd, hidden, "help-text"},
-    { "default-arch", eSetVarTypeString, "x86_64", NULL,       false,  false,   "Default architecture to choose, when there's a choice." },
+    { "default-arch", eSetVarTypeString, NULL, NULL,       false,  false,   "Default architecture to choose, when there's a choice." },
     {  NULL, eSetVarTypeNone, NULL, NULL, 0, 0, NULL }
 };