build: also allow building static libraries for e.g. Android/iOS

5 jobs for android-package in 14 minutes and 48 seconds
Status Job ID Name Coverage
  Preparation
passed gst indent #59707

00:00:22

passed manifest #59706

00:00:24

 
  Build
passed build fedora x86_64 #59708

00:03:13

 
  Full Builds
passed build android arm64 api28 #59709

00:04:58

passed build cerbero fedora x86_64 #59710

00:11:10