nginx: bump to version 1.15.7
1.15.7 contains a number of bugfixes. From the changes file:
*) Bugfix: memory leak on errors during reconfiguration.
*) Bugfix: in the $upstream_response_time, $upstream_connect_time, and
$upstream_header_time variables.
*) Bugfix: a segmentation fault might occur in a worker process if the
ngx_http_mp4_module was used on 32-bit platforms.
https://nginx.org/en/CHANGES
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit bc60c57f6920ce055acb11ef4e3e7c2123ce9bf7)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>