GCC-4.6 update for precise

[Matthias Klose]

One more update taken from the 4.6 branch, including fixes for three wrong-code 
issues and some ice-on-valid-code fixes.  The control file changes affect the 
ARM cross compiler builds only.

   Matthias

gcc-4.6 (4.6.2-14ubuntu2) precise; urgency=low

   * Update to SVN 20120215 (r184282) from the gcc-4_6-branch.
     - Fix PR tree-optimization/46886, PR debug/51950, PR c/52181,
       PR middle-end/52230, PR bootstrap/51969, PR c++/52247, PR c/5218.
   * Don't add ARM sf/hf conflicts for cross package builds. LP: #913734.

  -- Matthias Klose <doko at ubuntu.com>  Thu, 16 Feb 2012 00:28:55 +0100