cmake/packaging: fix line length
fixes
set(CPACK_PACKAGE_NAME libre)
set(CPACK_PACKAGE_VENDOR baresip)
-set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Generic library for real-time communications with async IO support")
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Library for Real-Time Communications")
set(CPACK_PACKAGE_INSTALL_DIRECTORY ${CPACK_PACKAGE_NAME})
set(CPACK_PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
