Added a fixme for platform specific GetDirSeparator().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75461 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvmc/example/mcc16/plugins/PIC16Base/PluginMain.cpp

@@ -10,6 +10,8 @@ namespace llvmc {
 }
 
 // Returns the platform specific directory separator via #ifdefs.
+// FIXME: This currently work on linux and windows only. It does not 
+// work on other unices. 
 static std::string GetDirSeparator(void) {
 #ifdef __linux__
   return "/";