ppp: Add extra include dirs

Just run configure, the configure script is not really
a autoconf generated script so just run it

Include path is needed to be there since
the headers from it are used during build in subcomponents

Change-Id: Ib1f24fd18bc8564e3c74ab834b7cf0fdf955d0e1
(From OE-Core master rev: c64c9f7ffc88018404afdde373dfd7ef2bdf7ae8)

(From OE-Core rev: a11ebe122bc31127bae59a65dbabe9ce5c3f568c)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/ppp/ppp_2.4.7.bb

@@ -43,7 +43,11 @@ EXTRA_OECONF = "--disable-strip"
 # Package Makefile computes CFLAGS, referencing COPTS.
 # Typically hard-coded to '-O2 -g' in the Makefile's.
 #
-EXTRA_OEMAKE += ' COPTS="${CFLAGS}"'
+EXTRA_OEMAKE += ' COPTS="${CFLAGS} -I${S}/include"'
+
+do_configure () {
+	oe_runconf
+}
 
 do_install_append () {
 	make install-etcppp ETCDIR=${D}/${sysconfdir}/ppp