gdc executable name for install target

[Marco Leise via D.gnu]

Did the gdc executable name change? I tried to build the
2.068.2 FE + gcc-4.9 tag on gcc-4.9.4 and it installed as
"gdc" while all other compiler binaries installed in triplet
format (e.g. x86_64-pc-linux-gnu-c++) with "c++" being a symlink.
I remember it being that way for gdc, too.
(I'm using Gentoo Linux's gcc ebuild (install script)
patched with gdc, if that makes a difference.)

-- 
Marco