Make FindProgramByName return paths with slashes unmodified on Windows.

This makes its behaviour more consistent across platforms.

llvm-svn: 118048
diff --git a/llvm/lib/System/Unix/Program.inc b/llvm/lib/System/Unix/Program.inc
index 86d9b2a..e06f80b 100644
--- a/llvm/lib/System/Unix/Program.inc
+++ b/llvm/lib/System/Unix/Program.inc
@@ -66,8 +66,8 @@
   if (progName.find('/') != std::string::npos)
     return temp;
 
-  // At this point, the file name does not contain slashes. Search for it
-  // through the directories specified in the PATH environment variable.
+  // At this point, the file name is valid and does not contain slashes. Search
+  // for it through the directories specified in the PATH environment variable.
 
   // Get the path. If its empty, we can't do anything to find it.
   const char *PathStr = getenv("PATH");