PowerPC: incorrect library search order

PowerPC: incorrect library search order

First, need to match against just the CPU name, not the whole triplet.
Otherwise, the test picks up "*le-*" pattern from x86_64-apple-darwin
triplet.

Second, it should be testing for $target, not $host. Host may be
little endian by default, and the sysroot directory layout shouldn't
depend on whether it is built on LE or BE machine.

	* emulparams/elf32ppccommon.sh (LIBPATH_SUFFIX): Set from target
	cpu, not host.