Also removed the Alpine maintainer (as we usually do so we don't
annoy him) and changed the pkgver to 9999 (this package is present
in upstream Alpine, we don't want it to get replaced when Alpine
updates their version).
Add qt5-qtbase with OpenGL ES2 enabled and adjust the
upstream compatibility test case.
* Test case: don't get the qt5-qtbase version from any APKINDEX, but
only from Alpine's community APKINDEX
* Test case: If the pkgver is 9999, look at _pkgver
