Add MinGW GCC 4.5.2 include paths, from Matthieu Monrocq

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127124 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/InitHeaderSearch.cpp b/lib/Frontend/InitHeaderSearch.cpp
index dc40784..4b1f782 100644
--- a/lib/Frontend/InitHeaderSearch.cpp
+++ b/lib/Frontend/InitHeaderSearch.cpp
@@ -534,6 +534,7 @@
     AddPath("/usr/include/w32api", System, true, false, false);
     break;
   case llvm::Triple::MinGW32:
+    AddPath("/mingw/include", System, true, false, false);
     AddPath("c:/mingw/include", System, true, false, false);
     break;
   default:
@@ -582,6 +583,8 @@
             false, false);
     AddPath("c:/MinGW/include/c++/4.5.2/backward", CXXSystem, true, false,
             false);
+    // Try gcc 4.5.2 (MSYS)
+    AddMinGWCPlusPlusIncludePaths("/mingw/lib/gcc", "mingw32", "4.5.2");
     // Try gcc 4.5.0
     AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.0");
     // Try gcc 4.4.0