Added tests directory to the list of excluded files from package

Commit 04abd0ef on seed2/client.git added the tests/test-client.sh script.
Commit d9623f36 on seed2/coleta.git added the tests/test.sh script.

Those scripts don't need to be on the downloadable package, so we are adding
"tests" to the list of excluded files.

Acked-by: Diego Giovane Pasqualin <dgp06@c3sl.ufpr.br>
Acked-by: Ricardo Tavares de Oliveira <rto07@c3sl.ufpr.br>
Signed-off-by: Vinicius Ruoso <vkr07@c3sl.ufpr.br>

build-agent-files

@@ -139,6 +139,7 @@ lib/libxml2*/*
 lib/*.tar.gz
 Makefile
 TODO
+tests
 EOF
 
 printf "Copying collect files..."
@@ -158,6 +159,7 @@ NEWS
 README
 AUTHORS
 TODO
+tests
 EOF
 
 printf "Copying client files..."