net-p2p/zetacoin{-no11}: mark broken on armv6

clean up broken message [1]

c++: warning: argument unused during compilation: '-L/usr/local/lib'
c++: warning: argument unused during compilation:
'-L/usr/local/lib/db48'
c++: warning: argument unused during compilation: '-L/usr/local/lib'
c++: warning: argument unused during compilation:
'-L/usr/local/lib/db48'
In file included from helpers/memenv/memenv.cc:9:
In file included from ./port/port.h:14:
In file included from ./port/port_posix.h:50:
./port/atomic_pointer.h:212:2: error: Please implement AtomicPointer for
this pl
atform.
^
1 error generated.

Suggested by: mat@, dafne@