Lpc2000

hi all,

    I downloaded newlib-lpc(rel 2) from Aeolous Development(thx!) but
fail to compile in Windows & Linux(with gnuarm's toolchain). I changed
the example.mak to make it happy to compile in my environment. Here is
the patch.

Changes:
- Library path autodetection (without specific the path of libgcc.a)
- dep/clean target added.
- s/newlib-lpc/libnewlib-lpc/g