Add context-info.sh to linked tests

Add context-info.sh to the test scripts linked into the cmake build
directory, so that these tests are available as well.

Signed-off-by: David Brown <david.brown@linaro.org>
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index cc68663..7d85adb 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -166,6 +166,7 @@
         link_to_source(seedfile)
     endif()
     link_to_source(compat.sh)
+    link_to_source(context-info.sh)
     link_to_source(data_files)
     link_to_source(scripts)
     link_to_source(ssl-opt.sh)