automake: replace INCLUDES by AM_CPPFLAGS

INCLUDES are now deprecated and throw warnings when using automake 1.13.
We now also differentiate AM_CPPFLAGS and AM_CFLAGS, where includes and
defines are passed to AM_CPPFLAGS only.

src/scepclient/Makefile.am

@@ -4,16 +4,13 @@ scepclient.c scep.c scep.h
 
 scepclient.o :	$(top_builddir)/config.status
 
-INCLUDES = \
--I$(top_srcdir)/src/libstrongswan \
--I$(top_srcdir)/src/libhydra
-
-AM_CFLAGS = \
--DIPSEC_CONFDIR=\"${sysconfdir}\" \
--DPLUGINS=\""${scepclient_plugins}\""
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/libstrongswan \
+	-I$(top_srcdir)/src/libhydra \
+	-DIPSEC_CONFDIR=\"${sysconfdir}\" \
+	-DPLUGINS=\""${scepclient_plugins}\""
 
 scepclient_LDADD = \
 $(top_builddir)/src/libstrongswan/libstrongswan.la
 
 dist_man_MANS = scepclient.8
-