[locale] uClibc is built with 'generic' support for stdc++ locale()

Quote from libstdc++-v3/config.log:
configure:15959: checking for C locale to use
configure:15963: result: generic
[win32/jenkins] - activate multi processing for win32 build
[win32/jenkins] - add parallel compile for pvr addons and use 1.5 * cpu count for make
AESinkALSA: Fix S24NE4MSB incorrectly reported as S24NE4

The ALSA sink reports both S24NE4 (sample in LSB) and 24-bit S32NE
(sample in MSB) as AE_FMT_S24NE4.

Report the latter correctly as AE_FMT_S24NE4MSB instead, otherwise
sample conversion goes wrong resulting in noise.
Change JSON-RPC PlayerOperations to perform a channel switch instead of reopening PVR playback, when PVR is already playing.
Merge pull request #5293 from Memphiz/win32mp

[jenkins/win32] - speed up compilation by activating parallel builds
ffmpeg: fix failing filter caused by invalid time_base.num or aspect_ratio.num
Merge pull request #5300 from FernetMenta/pict

ffmpeg: fix failing filter caused by invalid time_base.num or aspect_rat...
Merge pull request #5297 from anssih/fix/alsa-s24

AESinkALSA: Fix S24NE4MSB incorrectly reported as S24NE4
FIX: [droid] re-add default joystick keymap
Merge pull request #5301 from koying/quickpr

FIX: [droid] re-add default joystick keymap
Merge pull request #5298 from groth-its/pvr-channel-switch

[JSON-RPC] FIX: Do not reopen PVR playback when new channel requested
Merge pull request #5289 from bkuhls/uClibc

[locale] uClibc is built with 'generic' support for stdc++ locale()
FIX: prevent switching to windowed mode on windowing system not actually supporting it
FIX: do not mark resolution as changed if it didn't