bug#21214: symlinks cc -> gcc, lex -> flex etcetc

[Danny Milosavljevic]

Hello,

I tried to build coreboot earlier and by default it seems to use "cc"
in some places (for example util/cbfstool) and thus fails if one
doesn't manually select an explicit compiler via a make (or environment)
variable.

Guix doesn't have "cc" (it does have "gcc"). It would be convenient if
the former were available as a link.

With kind regards,
    Danny