[OC]: added support for RHEL8.2

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

cmake_targets/tools/build_helper

@@ -113,6 +113,7 @@ check_supported_distribution() {
         "rhel7.6")     return 0 ;;
         "rhel7.7")     return 0 ;;
         "rhel7.8")     return 0 ;;
+        "rhel8.2")     return 0 ;;
         "centos7")     return 0 ;;
     esac
     return 1
@@ -243,7 +244,7 @@ compilations() {
 install_protobuf_from_source(){
     protobuf_install_log=$OPENAIR_DIR/cmake_targets/log/protobuf_install_log.txt
     echo_info "\nInstalling Google Protobuf from sources. The log file for Protobuf installation is here: $protobuf_install_log "
-#commented for debug    (
+    (
     cd /tmp
     echo "Downloading protobuf"
     #rm -rf /tmp/protobuf-2.6.1.tar.gz* /tmp/protobuf-2.6.1
@@ -272,14 +273,15 @@ install_protobuf_from_source(){
       ./configure
       make -j`nproc`
       make install
+      ldconfig
     fi
-#commented for debug    ) >& $protobuf_install_log
+    ) >& $protobuf_install_log
 }
 
 install_protobuf_c_from_source(){
     protobuf_c_install_log=$OPENAIR_DIR/cmake_targets/log/protobuf_c_install_log.txt
     echo_info "\nInstalling Google Protobuf_C from sources. The log file for Protobuf_C installation is here: $protobuf_c_install_log "
-#commented for debug    (
+    (
     if [[ "$OS_DISTRO" == "rhel" ]] || [[ "$OS_DISTRO" == "centos" ]]; then
         export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
     fi
@@ -295,7 +297,7 @@ install_protobuf_c_from_source(){
     make -j`nproc`
     $SUDO make install
     $SUDO ldconfig
-#commented for debug    ) >& $protobuf_c_install_log
+    ) >& $protobuf_c_install_log
 }
 
 install_usrp_uhd_driver_from_source(){
@@ -773,6 +775,8 @@ check_install_oai_software() {
       libxml2 \
       libxml2-devel \
       libxslt-devel \
+      ninja-build \
+      make \
       openssh-clients \
       openssh-server \
       openssl \