new port LINK_SPEC changes allowed during phase 4?

[Joern Rennecke]

I find that I'll have to change the epiphany LINK_SPEC to allow sane  
interaction
between libc and libgloss.  The latter might need errno / __errno from the
former.
May I apply a patch to config/epiphany/epiphany.h to fix this during phase 4?