File llvm-fix-find-gcc5-install.patch of Package llvm5

Index: cfe-5.0.0rc1.src/lib/Driver/ToolChains.cpp
===================================================================
--- cfe-5.0.0rc1.src/lib/Driver/ToolChains/Gnu.cpp
+++ cfe-5.0.0rc1.src/lib/Driver/ToolChains/Gnu.cpp
@@ -1294,7 +1294,8 @@
   GoodVersion.MajorStr = First.first.str();
   if (First.second.empty())
     return GoodVersion;
-  if (Second.first.getAsInteger(10, GoodVersion.Minor) || GoodVersion.Minor < 0)
+  if (!Second.first.str().empty() && 
+      (Second.first.getAsInteger(10, GoodVersion.Minor) || GoodVersion.Minor < 0))
     return BadVersion;
   GoodVersion.MinorStr = Second.first.str();