don't fail on inability to install dynamic linker (e.g. if not root)

Makefile

@@ -110,7 +110,7 @@ $(DESTDIR)$(includedir)/%: include/%
 	install -D -m 644 $< $@
 
 $(DESTDIR)$(LDSO_PATHNAME): lib/libc.so
-	install -d -m 755 $(DESTDIR)$(syslibdir)
+	install -d -m 755 $(DESTDIR)$(syslibdir) || true
 	ln -sf $(libdir)/libc.so $@ || true
 
 .PRECIOUS: $(CRT_LIBS:lib/%=crt/%)