swanctl: Use a ./configure-able swanctl base directory

src/swanctl/Makefile.am

@@ -1,7 +1,5 @@
 sbin_PROGRAMS = swanctl
 
-conffile = `dirname $(strongswan_conf)`/strongswan.d/swanctl.conf
-
 swanctl_SOURCES = \
 	command.c command.h \
 	commands/initiate.c \
@@ -11,7 +9,7 @@ swanctl_SOURCES = \
 	commands/list_sas.c \
 	commands/list_pols.c \
 	commands/load_conns.c \
-	swanctl.c
+	swanctl.c swanctl.h
 
 swanctl_LDADD = \
 	$(top_builddir)/src/libcharon/plugins/vici/libvici.la \
@@ -22,5 +20,5 @@ swanctl.o :		$(top_builddir)/config.status
 AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/libstrongswan \
 	-I$(top_srcdir)/src/libcharon/plugins/vici \
-	-DCONF_FILE=\""${conffile}\"" \
+	-DSWANCTLDIR=\""${swanctldir}\"" \
 	-DPLUGINS=\""${s_plugins}\""