Bug#693240: clang update needed to support c++ includes in multiarch location

[Matthias Klose]

Package: clang
Version: 3.1-8

GCC 4.7.2-5 (as currently in VCS) moves the c++ header files into a multiarch
location, for an x86_64-linux-gnu compiler the following directories should be
searched:

gcc -m64:
  /usr/include/c++/4.7
  /usr/include/x86_64-linux-gnu/c++/4.7

gcc -m32:
  /usr/include/c++/4.7
  /usr/include/x86_64-linux-gnu/c++/4.7/32
  /usr/include/i386-linux-gnu/c++/4.7
  but not /usr/include/x86_64-linux-gnu/c++/4.7

gcc -mx32:
  /usr/include/c++/4.7
  /usr/include/x86_64-linux-gnu/c++/4.7/x32
  /usr/include/x86_64-linux-gnux32/c++/4.7
  but not /usr/include/x86_64-linux-gnu/c++/4.7