Create Debian and RPM packages from CMakeLists

Packages must have a name, a version, a section, an architecture, a maintainer, a description (long and summary), dependencies
Shared libraries must be stripped, have soversion, version (debug symbols are found in separate packages), since MODULE is used instead of SHARED it works as a plugin library which is opened using dlopen-like functionality, see:  https://cmake.org/cmake/help/latest/command/add_library.html
Packages must have postin and postun scripts
Since it is not recommended to modify CMAKE_EXE_LINKER_FLAGS, cmake's path variables are used : https://discourse.cmake.org/t/how-do-i-replace-the-compiler-options-for-one-target/7815/5

tools/packages/systemd_services/oai-lte/lte-softmodem.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=lte-softmodem
+
+[Service]
+Type=simple
+User=root
+Group=root
+ExecStart=/usr/bin/lte-softmodem -O /etc/openairinterface/lte/enb.band7.tm1.50PRB.usrpb210.conf --device.name oai_usrpdevif
+Restart=on-failure
+RestartSec=5s
+
+[Install]
+WantedBy=multi-user.target

tools/packages/systemd_services/oai-nr/nr-cuup.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=nr-cuup
+
+[Service]
+Type=simple
+User=root
+Group=root
+ExecStart=/usr/bin/nr-cuup -O /etc/openairinterface/nr/gnb-cuup.sa.f1.conf
+Restart=on-failure
+RestartSec=5s
+
+[Install]
+WantedBy=multi-user.target

tools/packages/systemd_services/oai-nr/nr-softmodem.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=nr-softmodem
+
+[Service]
+Type=simple
+User=root
+Group=root
+ExecStart=/usr/bin/nr-softmodem -O /etc/openairinterface/nr/gnb.sa.band78.fr1.106PRB.usrpb210.conf -E --continuous-tx -A -2 --device.name oai_usrpdevif 
+
+Restart=on-failure
+RestartSec=5s
+
+[Install]
+WantedBy=multi-user.target