Log Message:
Split a patch into standard patches.

date: 2015-04-03 09:41:26 +0200;  author: mrg;  state: Exp;  commitid: \ 
HjchnsCySB9wh7gy;
port some changes from netbsd gmp and adapt them to the gmp 6.x.
this allows devel/gmp to build on armv4.