Add openssl to ffmpeg linux builds

We need ffmpeg+openssl to enable multimedia networking.
We kept it disabled on linux since we had linking dependency.
The related patch in QtMM resolves openssl symbols dynamicaly
and address the mandatory dependency.

Change-Id: Idad0618a5320ae32d50fe1f3866c4ffd1bf8f542
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: Lars Knoll <lars@knoll.priv.no>
(cherry picked from commit 7300099520)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

coin/provisioning/common/unix/install-ffmpeg.sh

@@ -109,6 +109,8 @@ build_ffmpeg() {
 
 if [ "$os" == "linux" ]; then
   install_ff_nvcodec_headers
+
+  ffmpeg_config_options+=" --enable-openssl"
   build_ffmpeg
   sudo mv "$ffmpeg_source_dir/build/installed/usr/local/$ffmpeg_name" "/usr/local"
   SetEnvVar "FFMPEG_DIR" "/usr/local/$ffmpeg_name"

coin/provisioning/qtci-linux-SLES-15_SP4-x86_64/02-zypperpackages.sh

@@ -58,6 +58,7 @@ sudo zypper -nq install bison flex gperf \
         zlib-devel \
         libudev-devel \
         glib2-devel \
+        libopenssl-3-devel \
         freetype2-devel \
         fontconfig-devel \
         sqlite3-devel \