audio: do not use GNU old-style field designators

Avoiding the use of gnu extensions improves code portability

Change-Id: Ifa8f5d230de20a6284bb943c1ca3c48fd5fd5f2d
wifi: Link libwpa_client only if wpa_supplicant was chosen

Change-Id: Ic487c3767a17299880e83080b79a91dbbaef1234
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>