Add support for current Ubuntu Quantal and the upcoming Raring.
Patch by Martin Nowack.

llvm-svn: 170147
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index 0cf4024..251467c 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -2062,6 +2062,8 @@
   UbuntuNatty,
   UbuntuOneiric,
   UbuntuPrecise,
+  UbuntuQuantal,
+  UbuntuRaring,
   UnknownDistro
 };
 
@@ -2079,7 +2081,7 @@
 }
 
 static bool IsUbuntu(enum LinuxDistro Distro) {
-  return Distro >= UbuntuHardy && Distro <= UbuntuPrecise;
+  return Distro >= UbuntuHardy && Distro <= UbuntuRaring;
 }
 
 static LinuxDistro DetectLinuxDistro(llvm::Triple::ArchType Arch) {
@@ -2101,6 +2103,8 @@
           .Case("natty", UbuntuNatty)
           .Case("oneiric", UbuntuOneiric)
           .Case("precise", UbuntuPrecise)
+          .Case("quantal", UbuntuQuantal)
+          .Case("raring", UbuntuRaring)
           .Default(UnknownDistro);
     return Version;
   }