cross-powerpc64le-linux-gnu: fix sed substitutions and symlinks

This does fixes similar to aarch64, for the same reasons.

[ci skip]

srcpkgs/cross-powerpc64le-linux-gnu/template

@@ -185,16 +185,19 @@ _glibc_build() {
 	[ ! -d glibc-build ] && mkdir glibc-build
 	cd glibc-build
 
+	echo "slibdir=/usr/lib" > configparms
+
 	echo "libc_cv_forced_unwind=yes" > config.cache
 	echo "libc_cv_c_cleanup=yes" >> config.cache
 
 	export CC="${_triplet}-gcc" LD="${_triplet}-ld" \
 		AS="${_triplet}-as" CPP="${_triplet}-cpp" \
 		NM="${_triplet}-nm"
-	export CFLAGS="-O2 -pipe -Wno-error ${_archflags}"
+	export CFLAGS="-O2 -pipe -Wno-error"
 
-	_args="--host=${_triplet}"
-	_args+=" --prefix=/usr"
+	_args="--prefix=/usr"
+	_args+=" --libdir=/usr/lib"
+	_args+=" --host=${_triplet}"
 	_args+=" --with-headers=${_sysroot}/usr/include"
 	_args+=" --config-cache"
 	_args+=" --enable-obsolete-rpc"
@@ -225,9 +228,9 @@ _gcc_build() {
 	# Make this link to target libs.
 	if [ ! -f .sed_subst_done ]; then
 		sed -e "s, /lib/, ${_sysroot}/lib/,g;s, /usr/lib/, ${_sysroot}/usr/lib/,g" \
-			-i ${_sysroot}/lib/libc.so ${_sysroot}/lib/libpthread.so
-		sed -e "s, /lib64/, ${_sysroot}/lib64/,g;s, /usr/lib/, ${_sysroot}/usr/lib/,g" \
-			-i ${_sysroot}/lib/libc.so ${_sysroot}/lib/libpthread.so
+			-i ${_sysroot}/usr/lib/libc.so
+		sed -e "s, /lib64/, ${_sysroot}/lib64/,g;s, /usr/lib64/, ${_sysroot}/usr/lib64/,g" \
+			-i ${_sysroot}/usr/lib/libc.so
 		touch .sed_subst_done
 	fi
 
@@ -298,6 +301,10 @@ do_install() {
 				${DESTDIR}/${_sysroot}/${f}
 		fi
 	done
+	mkdir -p ${DESTDIR}/${_sysroot}/usr/lib
+	ln -sf lib ${DESTDIR}/${_sysroot}/usr/lib64
+	ln -sf usr/lib ${DESTDIR}/${_sysroot}/lib64
+	ln -sf usr/lib ${DESTDIR}/${_sysroot}/lib
 
 	# install linux API headers
 	cd ${wrksrc}/linux-${_linux_version}