audio/libopenshot-audio: fix build with GCC-based architectures
error:
CMake Error in CMakeLists.txt:
Target "openshot-audio" requires the language dialect "CXX11" , but CMake does not know the compile flags to use to enable it.
PR: 237867
Submitted by: tatsuki_makino@hotmail.com (maintainer)
Approved by: linimon (mentor)