cerbero: add support for amazon linux 2

amazon linux 2 is based of rhel 7

Part-of: <!689>
16 jobs for master in 71 minutes and 28 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build Docker
passed alpine amd64 manifest builder docker #8409625

00:00:18

passed android docker #8409624

00:00:20

passed cerbero fedora amd64 docker #8409623

00:00:20

passed fedora amd64 docker #8409622

00:00:21

passed gst-indent amd64 docker #8409626

00:00:19

passed windows amd64 docker #8409627
windows shell 1809

00:00:09

 
  Preparation
passed manifest #8409628

00:00:19

 
  Build
passed cerbero deps cross-android universal #8409630
gstreamer

00:20:01

passed cerbero deps cross-ios universal #8409634
gst-ios-14.3

01:06:20

passed cerbero deps cross-windows x86 #8409631
gstreamer

00:09:03

passed cerbero deps cross-windows x86_64 #8409632
gstreamer

00:12:17

passed cerbero deps fedora x86_64 #8409629
gstreamer

00:08:53

passed cerbero deps macos x86_64 #8409633
gst-macos-11.1

00:50:31

passed cerbero deps msvc x86_64 #8409635
docker windows gstreamer-windows 1809

00:43:36

 
  Integrate
passed cerbero cross-android universal examples #8409636

00:05:50

passed cerbero cross-ios universal examples #8409637
gst-ios-14.3

00:04:26