build: Remove the old PIC/PIE patch, let libtool sort it out

* Remove the old change from '08 to add in PIE arguments at automake level.
  Versions of libtool since then know how to deal with -fpie and do the right
  thing according to whether its building shared or executable objects.
  So just pass '-fpie' as CFLAG and let libtool do its thing.
diff --git a/ospfclient/Makefile.am b/ospfclient/Makefile.am
index c4f0da8..8a3ad21 100644
--- a/ospfclient/Makefile.am
+++ b/ospfclient/Makefile.am
@@ -22,6 +22,5 @@
 ospfclient_LDADD = libospfapiclient.la \
 	../ospfd/libospf.la ../lib/libzebra.la @LIBCAP@
 
-ospfclient_CFLAGS = $(AM_CFLAGS) $(PICFLAGS)
-ospfclient_LDFLAGS = $(AM_LDFLAGS) $(PILDFLAGS)
-
+ospfclient_CFLAGS = $(AM_CFLAGS)
+ospfclient_LDFLAGS = $(AM_LDFLAGS)