suppress the failures of the musl/pleval test

ideally it should be rewritten so the test does not depend on internals,
but generated .mo files, for now that static linked test works so keep it.
diff --git a/src/musl/pleval.mk b/src/musl/pleval.mk
new file mode 100644
index 0000000..c15058a
--- /dev/null
+++ b/src/musl/pleval.mk
@@ -0,0 +1,5 @@
+# suppress warnings, with gcc -Wno-parentheses -Wno-bool-compare is needed
+$(N).CFLAGS := -w
+# do not build and run the dynamic link tests (__pleval is no longer public)
+$(B)/$(N).err:
+	touch $@