Update a missed getHostTriple call, fixes non-__APPLE__ build

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@143774 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Host/common/Host.cpp b/source/Host/common/Host.cpp
index 9993a84..eec5eb1 100644
--- a/source/Host/common/Host.cpp
+++ b/source/Host/common/Host.cpp
@@ -310,7 +310,7 @@
 
     if (g_supports_32 == false && g_supports_64 == false)
     {
-        llvm::Triple triple(llvm::sys::getHostTriple());
+        llvm::Triple triple(llvm::sys::getDefaultTargetTriple());
 
         g_host_arch_32.Clear();
         g_host_arch_64.Clear();