Freeze exception for gdc-4.3

[Iain Buclaw]

I'd like a freeze exception for gdc-4.3-1.060-4.3.5-1.
Fixes #577598 and all D software can now build on sparc (closing #475857,
and about a dozen others like it).

Regards
-- 
Iain Buclaw

*(p < e ? p++ : p) = (c & 0x0f) + '0';