chore(build): force qt5 version and dir in rpm

build/rpm/qt5.spec

 # -*- rpm-spec -*-
 
+%define _qt5_version 5.10.1
+%define _qt5_dir /opt/com.belledonne-communications/linphone
+
 %define _qt5_archdatadir %{_qt5_dir}
 %define _qt5_bindir %{_qt5_dir}/bin
 %define _qt5_docdir %{_qt5_dir}/doc

tools/build_qt_rpm

@@ -74,8 +74,4 @@ cd ..
 mkdir -p ${RPM_FOLDER}/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
 tar --transform "s/^${REPO_FOLDER}/${RPM_NAME}/" -czvf ${RPM_FOLDER}/rpmbuild/SOURCES/${RPM_NAME}.tar.gz ${REPO_FOLDER}/
 
-rpmbuild -bb \
-  --define '_qt5_dir /opt/com.belledonne-communications/linphone' \
-  --define "_qt5_version ${QT_VERSION}" \
-  --define "_topdir $PWD/${RPM_FOLDER}/rpmbuild" \
-  build/rpm/qt5.spec
+rpmbuild -bb --define "_topdir $PWD/${RPM_FOLDER}/rpmbuild" build/rpm/qt5.spec