test-many-klibcs: Always use GNU ld for ppc64
Yet another architecture where LLD 13 fails. I didn't investigate
this very far but it looked like the global register was not being
initialised correctly.
diff --git a/test-many-klibcs b/test-many-klibcs
index 1bed936..8103b1f 100755
--- a/test-many-klibcs
+++ b/test-many-klibcs
@@ -324,9 +324,9 @@
process ppc powerpc gnu powerpc-linux-gnu ppc
process ppc powerpc llvm powerpc-linux-gnu ppc
process ppc64 powerpc gnu powerpc64-linux-gnu ppc64
-process ppc64 powerpc llvm powerpc64-linux-gnu ppc64
+process ppc64 powerpc mixed powerpc64-linux-gnu ppc64
process ppc64 powerpc gnu powerpc64le-linux-gnu ppc64le
-process ppc64 powerpc llvm powerpc64le-linux-gnu ppc64le
+process ppc64 powerpc mixed powerpc64le-linux-gnu ppc64le
process riscv64 riscv gnu riscv64-linux-gnu riscv64
process riscv64 riscv mixed riscv64-linux-gnu riscv64
# 32-bit s390 is no longer supported in Debian.
