remove superfluous strdup() calls
remove superfluous strdup() calls

Remove same calls of strdup() that were unnecessary because the
temporary string would not be modified or held longer than the lifetime
of the original string.

takaswie/alsa-lib,lgirdwood/alsa-lib,lgirdwood/alsa-lib,mikelima/alsa-lib,alsa-project/alsa-lib,mengdonglin/alsa-lib,tiwai/alsa-lib,mikelima/alsa-lib,takaswie/alsa-lib,lgirdwood/alsa-lib,zedongchen/alsa-lib,mengdonglin/alsa-lib,zedongchen/alsa-lib,mengdonglin/alsa-lib,tiwai/alsa-lib,mikelima/alsa-lib,tiwai/alsa-lib,gittup/alsa-lib,takaswie/alsa-lib,gittup/alsa-lib,gittup/alsa-lib,takaswie/alsa-lib,mengdonglin/alsa-lib,mengdonglin/alsa-lib,Distrotech/alsa-lib,zedongchen/alsa-lib,lgirdwood/alsa-lib,Distrotech/alsa-lib,mikelima/alsa-lib,takaswie/alsa-lib,Distrotech/alsa-lib,zedongchen/alsa-lib,zedongchen/alsa-lib,alsa-project/alsa-lib,gittup/alsa-lib,alsa-project/alsa-lib,mikelima/alsa-lib,lgirdwood/alsa-lib,Distrotech/alsa-lib,Distrotech/alsa-lib,tiwai/alsa-lib,alsa-project/alsa-lib