lksctp-tools: Add RRECOMENDS kernel-module-sctp for pkg lksctp-tools

Previously the kernel module was only pulled in for ${PN}-utils and
${PN}-ptest, but not for the library itself. As a result, appsexternal
to this recipe  using only the library fail because kernel module is
not installed in the image.

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-networking/recipes-support/lksctp-tools/lksctp-tools_1.0.18.bb

@@ -65,5 +65,6 @@ FILES_${PN}-dev += " \
 
 FILES_${PN}-utils = "${bindir}/*"
 
+RRECOMMENDS_${PN} += "kernel-module-sctp"
 RRECOMMENDS_${PN}-utils += "kernel-module-sctp"
 RRECOMMENDS_${PN}-ptest += "kernel-module-sctp"