[uClibc] ltrace does not compile in buildroot for powerpc

[Joakim Tjernlund]

Ouput from todays buildroot:

make CC=/mnt/src/jocke/bb7/buildroot/build_powerpc_nofpu/staging_dir/bin/powerpc-linux-uclibc-gcc
LD=/mnt/src/jocke/bb7/buildroot/build_powerpc_nofpu/staging_dir/bin/powerpc-linux-uclibc-ld ARCH=powerpc \
        -C /mnt/src/jocke/bb7/buildroot/build_powerpc_nofpu/ltrace-0.3.35
make[1]: Entering directory `/mnt/src/jocke/bb7/buildroot/build_powerpc_nofpu/ltrace-0.3.35'
make -C sysdeps/linux-gnu
make[2]: Entering directory `/mnt/src/jocke/bb7/buildroot/build_powerpc_nofpu/ltrace-0.3.35/sysdeps/linux-gnu'
make[2]: *** No rule to make target `powerpc/arch.h', needed by `sysdep.h'.  Stop.
make[2]: Leaving directory `/mnt/src/jocke/bb7/buildroot/build_powerpc_nofpu/ltrace-0.3.35/sysdeps/linux-gnu'
make[1]: *** [sysdeps/sysdep.o] Error 2
make[1]: Leaving directory `/mnt/src/jocke/bb7/buildroot/build_powerpc_nofpu/ltrace-0.3.35'
make: *** [/mnt/src/jocke/bb7/buildroot/build_powerpc_nofpu/ltrace-0.3.35/ltrace] Error 2