libwslay: add package

Wslay is a WebSocket library written in C. It implements the protocol version 13
 described in RFC 6455. This library offers 2 levels of API: event-based API and
 frame-based low-level API. For event-based API, it is suitable for non-blocking
 reactor pattern style. You can set callbacks in various events. For frame-based
 API, you can send WebSocket frame directly. Wslay only supports data transfer
 part of WebSocket protocol and does not perform opening handshake in HTTP.

Signed-off-by: James Taylor <james@jtaylor.id.au>

libs/libwslay/patches/100-disable-doc.patch

@@ -0,0 +1,26 @@
+diff --git a/Makefile.am b/Makefile.am
+index ae8b02f..2e86973 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -20,6 +20,6 @@
+ # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+-SUBDIRS = lib tests examples doc
++SUBDIRS = lib tests
+
+ ACLOCAL_AMFLAGS = -I m4
+diff --git a/configure.ac b/configure.ac
+index 5e83cbf..88f4f03 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -123,9 +123,6 @@ AC_CONFIG_FILES([
+   lib/includes/Makefile
+   lib/includes/wslay/wslayver.h
+   tests/Makefile
+-  examples/Makefile
+-  doc/Makefile
+-  doc/sphinx/conf.py
+ ])
+ AC_OUTPUT
+