this package is crucial as it can cause failure of build for every package

I believe that all the changes are mature enough to be propagated to
openSUSE:Factory and test it against all the packages.

I'll check failing packages after submission and rebuild.

Lets break everything :)

- brp-25-symlink: add mising '/etc/alternatives' back to whitelist

- brp-25-symlink: fix eating /./ in path

- massive rewrite of brp-25-symlink to reduce number of calls our
tests shown speedup from 8,5 mins to 1 min for kernel-default
(year ago)

- All GTK apps are allowed to assume the presence of the
Adwaita-icon-theme package; As a result of this, we now accept icons
in icons/Adwaita on the whitelist (just as hicolor).
patch by DimStar

- remove brp-20-check-la, it is broken and la files are mostly
deleted anyway
- reduction of number of calls used by using more bashism, passing
more regexp at once, use more double quotes
brp-15-strip-debug
brp-45-tcl
brp-50-check-python
brp-60-hook