debian: Add cfg file examples for osmo-trx-{lms,uhd}

Sort cfg files according to their osmo-trx binary.
Install them during make install.
Add the installed cfg files to related debian packages.

Change-Id: I905cdac30b441e4df0a3f5c0924d1637b9f67b90
diff --git a/configure.ac b/configure.ac
index aae151b..974a611 100644
--- a/configure.ac
+++ b/configure.ac
@@ -225,6 +225,8 @@
     tests/Makefile \
     tests/CommonLibs/Makefile \
     tests/Transceiver52M/Makefile \
+    doc/Makefile \
+    doc/examples/Makefile \
 ])
 
 AC_OUTPUT