package/alsa-lib: bump version to 1.2.4

Rebased patch 0001, added patch 0002 to fix compile error with uClibc.

Changelog: https://www.alsa-project.org/wiki/Changes_v1.2.3.2_v1.2.4



Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>