[Mesa-stable] Cherry pick request: 1ee1d8ab4

[Ian Romanick]

Emil,

Can we get the following patch cherry picked to the 10.3
branch?  I have verified that it fixes bug #82932 on the
branch.

commit 1ee1d8ab468cafd25cfcc513319f3f046492947f
Author: Matt Turner <mattst88 at gmail.com>
Date:   Sun Aug 31 11:10:02 2014 -0700

    i965/vec4: Reswizzle sources when necessary.
    
    Despite the comment above the function claiming otherwise, the function
    did not reswizzle sources, which would lead to bad code generation since
    commit 04895f5c, which began claiming we could do such swizzling when we
    could not.
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82932
    Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>