Add oem needs libs,libwebsockets.

Different from apache-websocket in meta-openembedded layer,and qtwebsockets
in meta-qt5 layer,libwebsockets is a C library for lightweight websocket clients and servers,
can be used in embedded system.
Using Tanikawa-san's advice on the packageconfig and for the single recipe
only copy it from meta-oe(
   git://git.openembedded.org/meta-openembedded
   branch: master
   commit: 701397952efdb9790a2ea51c7b499f73243dc67b).
V2: rebase to master(a9bbfe1af2ae8ccf79db999e8007b7c6cbc806a1).

Change-Id: I6464a2b82ca57821959e46c2e2e3193f990e80f7
Signed-off-by: tte_zheng_wenlong <wenlong_zheng_za@mail.toyota.co.jp>