lava-templates/fvp-*.yaml: Add header with a file name

So it was clearly visible in the build logs which file is being used.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Ibd18734f4e5032c4ba9751ca517e3fe0f03581ae
diff --git a/script/lava-templates/fvp-linux.yaml b/script/lava-templates/fvp-linux.yaml
index c447c7a..54b198b 100644
--- a/script/lava-templates/fvp-linux.yaml
+++ b/script/lava-templates/fvp-linux.yaml
@@ -1,3 +1,4 @@
+# fvp-linux.yaml
 metadata:
   test_config: ${test_config}
   fvp_model: ${model}
diff --git a/script/lava-templates/fvp-tftf.yaml b/script/lava-templates/fvp-tftf.yaml
index a10bfbe..4639c4d 100644
--- a/script/lava-templates/fvp-tftf.yaml
+++ b/script/lava-templates/fvp-tftf.yaml
@@ -1,3 +1,4 @@
+# fvp-tftf.yaml
 metadata:
   test_config: ${test_config}
   fvp_model: ${model}