Add additional path to Linux toolchain.  Patch by Will Dietz.  PR10690.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137839 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 1bdbf24..821b07b 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -1564,6 +1564,9 @@
     else if (!llvm::sys::fs::exists("/usr/lib/x86_64-linux-gnu/gcc",
              Exists) && Exists)
       GccTriple = "x86_64-linux-gnu";
+    else if (!llvm::sys::fs::exists("/usr/lib64/gcc/x86_64-slackware-linux", Exists)
+            && Exists)
+      GccTriple = "x86_64-slackware-linux";
   } else if (Arch == llvm::Triple::x86) {
     if (!llvm::sys::fs::exists("/usr/lib/gcc/i686-linux-gnu", Exists) && Exists)
       GccTriple = "i686-linux-gnu";