branches: 1.1.1.2.40; 1.1.1.2.52;
import GCC-4.1 branch from 20070110 (revision 120647). this fixes the
44 GCC PR's listed below (some have already been applied to NetBSD GCC)
and at least one NetBSD PR:

PR bootstrap/28400
PR c++/27369
PR c/25795
PR c/25993
PR c/29092
PR c/29736
PR c/30360
PR debug/26964
PR libstdc++/11953
PR middle-end/21032
PR middle-end/26306
PR middle-end/27826
PR middle-end/28116
PR middle-end/29241
PR middle-end/29250
PR middle-end/29584
PR middle-end/29695
PR middle-end/29753
PR middle-end/30286
PR rtl-optimization/25514
PR rtl-optimization/27736
PR rtl-optimization/27761
PR rtl-optimization/28970
PR rtl-optimization/29631
PR rtl-optimization/29797
PR target/18553
PR target/24036
PR target/29114
PR target/29319
PR target/29377
PR target/29449
PR target/30039
PR target/30173
PR target/30185
PR target/30230
PR tree-opt/28545
PR tree-opt/29788
PR tree-opt/29964
PR tree-optimization/27891
PR tree-optimization/28888
PR tree-optimization/29581
PR tree-optimization/29610
PR tree-optimization/29637
PR tree-optimization/30212