- Replace incorrect usage of %_libexecdir with %_prefix/lib

- Update to alsa-utils 1.2.1:
* axfer: handle -ETIMEDOUT before non-block I/O operation
* axfer: code refactoring for a helper function to wait for avail buffer space
* axfer: handle -ETIMEDOUT before handle mmap I/O operation
* axfer: return ETIMEDOUT when no event occurs after waiter expiration
* axfer: fix to return error code when a call of select(2) fails
* axfer: return the number of file descriptors for I/O events from select(2) waiter
* axfer: test: fix invalid comparison of 64 bit storage in ILP32 data type
* axfer: mapper: fix parameter check for demuxer
* axfer: remove unused variable warnings
* alsamixer: Remove exp10 usage
* alsaucm, topology: LDADD cleanups and add support for libatopology
* alsaucm: fix the implicit card open
* alsaucm, topology: LDADD cleanups and add support for libatopology
* alsaucm: do the implicit ucm open only when the command requires it
* alsaucm: call snd_config_update_free_global() to make valgrind more happy
* amixer: do not double LF for container type
* aplay: fix memory leak when setup_chmap() fail