Arch Linux

Description: srsue crashes if any RF frontend library in ''optdepends'' is not installed on the system


Additional info:
* affected version: ``srslte-avx2 19.12-2``
* tested by running ``srsue`` without ``bladerf`` package installed.


Steps to reproduce:

* install srslte-avx and initialize configs
* uninstall package bladerf if exists (e.g. pacman -Rdd bladerf)
* start ``srsue``
* crash:
```
srsue: error while loading shared libraries: libbladeRF.so.2: cannot open shared object file: No such file or directory
```

Explaination:
During build, all RF frontends are enabled (as required by the build deps) and the srsLTE library is linked against the corresponding shared libraries (UHD, bladerf, ...).
However, srsLTE does not support dynamic loading of shared libraries, like e.g. ``dlopen(...)`` if library exists.

Suggested Solution:
Add all RF frontends from builddeps into regular deps. This should't hurt too much :-)