Make the GCC version proliferation worse by N+1 for the sake of
ArchLinux. =/ Fixes PR10246.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134299 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/InitHeaderSearch.cpp b/lib/Frontend/InitHeaderSearch.cpp
index 85e30f8..f0cb94e 100644
--- a/lib/Frontend/InitHeaderSearch.cpp
+++ b/lib/Frontend/InitHeaderSearch.cpp
@@ -831,6 +831,10 @@
                                 "x86_64-unknown-linux-gnu", "", "", triple);
 
     // Arch Linux gcc 4.6
+    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.1",
+                                "i686-pc-linux-gnu", "", "", triple);
+    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.1",
+                                "x86_64-unknown-linux-gnu", "", "", triple);
     AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.0",
                                 "i686-pc-linux-gnu", "", "", triple);
     AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6.0",