Changes

trau_rtp_conv.c cosmetic: fix typo in name of static function

Change I7a6d13d406484c01210594bb6d2f0aff7c1341ab introduced
a static function in src/trau/trau_rtp_conv.c that was intended
to be named twts002_hr16_set_extra_flags().  However, a typo
crept in unnoticed, and the patch was merged with this function
name misspelled as twtw002_hr16_set_extra_flags().  Fix it.

Related: OS#6448
Change-Id: I63bb678f7a1f26fefba070ddc10850db24cb88b3