compiler flags in audiomanager.pc.in

[kodiakz]

audiomanager.pc.in sets Cflags to include AUDIOMANAGER_CMAKE_CXX_FLAGS, which in turn brings in the -pedantic flag. This is intrusive to the user of that pkg-config, enforcing to provide own code to be compatible - and sometimes impossible if using incompatible 3rd party code.
What is the intention of including extraneous flags here? -pedantic should not be enforced in the interface.

This is most likely a relict from the early days of the audiomanager. Although the AM itself claims conformity with ISO C++, it seems reasonable not strictly requiring this from users of the accompanying libraries.
So I propose removing this flag from the projects exports (both pkgconfig and cmake).