scons: i915 can't build on MSVC either.

I thought I had singled it out before, but apparently not.
diff --git a/src/gallium/SConscript b/src/gallium/SConscript
index 1b41c39..eb4f49f 100644
--- a/src/gallium/SConscript
+++ b/src/gallium/SConscript
@@ -13,7 +13,6 @@
 SConscript([
     'drivers/failover/SConscript', 
     'drivers/galahad/SConscript',
-    'drivers/i915/SConscript', 
     'drivers/identity/SConscript', 
     'drivers/llvmpipe/SConscript', 
     'drivers/rbug/SConscript',
@@ -25,6 +24,7 @@
 if not env['msvc']:
     # These drivers do not build on MSVC compilers
     SConscript([
+        'drivers/i915/SConscript', 
         'drivers/i965/SConscript',
         'drivers/r300/SConscript',
     ])