update version in libwebsockets.pc

Signed-off-by: Andy Green <andy.green@linaro.org>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 085ea7f..97b120b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -713,7 +713,7 @@
 
 Name: libwebsockets
 Description: Websockets server and client library
-Version: ${PACKAGE_VERSION}
+Version: ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}
 
 Libs: -L\${libdir} -lwebsockets
 Cflags: -I\${includedir}"