netem: fix installs of dist files

The tc program searches LIBDIR by default for the .dist files, and that
defaults to /usr/lib.  But the netem subdir has /lib/ hardcoded which
means the default build+install results in the files not being found.

Further, these are plain text files which are read at runtime, so it
doesn't make sense to give them executable bits.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

netem/Makefile

@@ -20,9 +20,9 @@ stats: stats.c
 	$(HOSTCC) $(CCOPTS) -I../include -o $@ $@.c -lm
 
 install: all
-	mkdir -p $(DESTDIR)/lib/tc
+	mkdir -p $(DESTDIR)$(LIBDIR)/tc
 	for i in $(DISTDATA); \
-	do install -m 755 $$i $(DESTDIR)/lib/tc; \
+	do install -m 644 $$i $(DESTDIR)$(LIBDIR)/tc; \
 	done
 
 clean: