[PATCH] [Driver] Move description of toolchain specific include directories from the common driver code to the corresponding `MultilibSet` declarations

[Simon Atanasyan]

Yes, I am going to add more code into these callback in the next patch. See http://reviews.llvm.org/D4790.

================
Comment at: include/clang/Driver/Multilib.h:158
@@ -152,1 +157,3 @@
 
+  MultilibSet &includeDirsCallback(IncludeDirsFunc F) {
+    IncludeCallback = F;
----------------
Rafael Ávila de Espíndola wrote:
> setincludeDirsCallback would be the correct name, no?
OK

http://reviews.llvm.org/D4720