In the process of migrating away from using docker.py to build our
containers we need to expose the command to the build environment. The
script is still a useful way to probe which command works though.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 configure | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure b/configure
index bab4e6df9f..edac4f3577 100755
--- a/configure
+++ b/configure
@@ -1779,6 +1779,7 @@ fi
 # functions to probe cross compilers
 
 container="no"
+runc=""
 if test $use_containers = "yes"; then
     case $($python "$source_path"/tests/docker/docker.py probe) in
         *docker) container=docker ;;
@@ -1787,6 +1788,7 @@ if test $use_containers = "yes"; then
     esac
     if test "$container" != "no"; then
         docker_py="$python $source_path/tests/docker/docker.py --engine $container"
+        runc=$($python "$source_path"/tests/docker/docker.py probe)
     fi
 fi
 
@@ -2386,6 +2388,7 @@ fi
 
 if test "$container" != no; then
     echo "ENGINE=$container" >> $config_host_mak
+    echo "RUNC=$runc" >> $config_host_mak
 fi
 echo "ROMS=$roms" >> $config_host_mak
 echo "MAKE=$make" >> $config_host_mak
-- 
2.34.1