From: Matt Oliver <protogonoi@gmail.com>

Was "[PATCH] libx264: Do not explicitly set X264_API_IMPORTS"

Setting X264_API_IMPORTS only affects msvc builds and it breaks
linking to static builds (although is required for shared builds).
This flag is set by x264 in its pkgconfig as required since build
158 (a615f027ed172e2dd5380e736d487aa858a0c4ff) from July 2019.
So this patch updates configure to require a newer x264 build that
correctly sets the imports flag.

The requirement for 158 is applied for msvc builds only,
no change is made for all other cases.

Co-authored-by: softworkz <softworkz@hotmail.com>
Signed-off-by: softworkz <softworkz@hotmail.com>
Signed-off-by: Matt Oliver <protogonoi@gmail.com>

Submitted-As: https://master.gitmailbox.com/ffmpegdev/pull.30.v5.ffstaging.FFmpeg.1653550090616.ffmpegagent@gmail.com
In-Reply-To: https://master.gitmailbox.com/ffmpegdev/pull.30.ffstaging.FFmpeg.1653088310211.ffmpegagent@gmail.com
In-Reply-To: https://master.gitmailbox.com/ffmpegdev/pull.30.v2.ffstaging.FFmpeg.1653471067991.ffmpegagent@gmail.com
In-Reply-To: https://master.gitmailbox.com/ffmpegdev/pull.30.v3.ffstaging.FFmpeg.1653471298766.ffmpegagent@gmail.com
In-Reply-To: https://master.gitmailbox.com/ffmpegdev/pull.30.v4.ffstaging.FFmpeg.1653476739751.ffmpegagent@gmail.com