Fix static linking of 'lvm.static', which indirectly depend on libpthread
via libdevmapper.a.

--- LVM2.2.02.166/tools/Makefile.in	2016-11-22 21:31:15.521045149 +0100
+++ LVM2.2.02.166/tools/Makefile.in	2016-11-22 21:31:24.085082767 +0100
@@ -148,7 +148,7 @@ endif
 
 lvm.static: $(OBJECTS) lvm-static.o $(top_builddir)/lib/liblvm-internal.a  $(interfacebuilddir)/libdevmapper.a
 	$(CC) $(CFLAGS) $(LDFLAGS) -static -L$(interfacebuilddir) -o $@ \
-	      $(OBJECTS) lvm-static.o $(LVMLIBS) $(STATIC_LIBS) $(LIBS)
+	      $(OBJECTS) lvm-static.o $(LVMLIBS) $(STATIC_LIBS) $(LIBS) $(PTHREAD_LIBS)
 
 liblvm2cmd.a: $(top_builddir)/lib/liblvm-internal.a $(OBJECTS) lvmcmdlib.o lvm2cmd.o
 	cat $(top_builddir)/lib/liblvm-internal.a > $@
