[cmake] Fix rpath for mfront / tfel on Ubuntu.

.cmake-format.yaml

@@ -158,3 +158,4 @@ parse:
         INSTALL_COMMAND: +
         BUILD_IN_SOURCE: 1
         LOG_OUTPUT_ON_FAILURE: 1
+        CMAKE_ARGS: +

scripts/cmake/DependenciesExternalProject.cmake

@@ -8,6 +8,9 @@ if(OGS_USE_MFRONT)
         BuildExternalProject(
             TFEL GIT_REPOSITORY https://github.com/thelfer/tfel.git
             GIT_TAG rliv-${ogs.minimum_version.tfel-rliv}
+            CMAKE_ARGS
+                -DCMAKE_INSTALL_RPATH=<INSTALL_DIR>/lib
+                -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=TRUE
         )
         set(ENV{TFELHOME} ${PROJECT_BINARY_DIR}/_ext/TFEL)
     endif()