sys/Host: Change getHostTriple() to return the full Darwin version on OS X.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129852 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Unix/Host.inc b/lib/Support/Unix/Host.inc
index ed74b67..8cbec8c 100644
--- a/lib/Support/Unix/Host.inc
+++ b/lib/Support/Unix/Host.inc
@@ -87,10 +87,7 @@
   std::string::size_type DarwinDashIdx = Triple.find("-darwin");
   if (DarwinDashIdx != std::string::npos) {
     Triple.resize(DarwinDashIdx + strlen("-darwin"));
-
-    // Only add the major part of the os version.
-    std::string Version = getOSVersion();
-    Triple += Version.substr(0, Version.find('.'));
+    Triple += getOSVersion();
   }
 
   return Triple;