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/libhydra/plugins/attr_sql/Makefile.am

@@ -1,9 +1,10 @@
-
-INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/src/libstrongswan \
+	-I$(top_srcdir)/src/libhydra \
+	-DPLUGINS=\""${pool_plugins}\""
 
 AM_CFLAGS = \
-	-rdynamic \
-	-DPLUGINS=\""${pool_plugins}\""
+	-rdynamic
 
 if MONOLITHIC
 noinst_LTLIBRARIES = libstrongswan-attr-sql.la