[PING] toplevel bootstrap patches

[Paolo Bonzini]

All are build machinery patches.

http://gcc.gnu.org/ml/gcc-patches/2005-12/msg01602.html*
[libcpp] Toplevel bootstrap fixes 1/4 
<http://gcc.gnu.org/ml/gcc-patches/2005-12/msg01602.html>

*http://gcc.gnu.org/ml/gcc-patches/2005-12/msg01684.html
[toplevel] Toplevel bootstrap fixes 2/4, bootstrap-lean (PR25452)

* 
<http://gcc.gnu.org/ml/gcc-patches/2005-12/msg01600.html>*http://gcc.gnu.org/ml/gcc-patches/2005-12/msg01600.html
*[toplevel] Toplevel bootstrap 3/4, remove directory symlinking 
<http://gcc.gnu.org/ml/gcc-patches/2005-12/msg01600.html>*

Paolo