Added directory 'testes/libs/P1' to the repository

This directory is used for some tests. As standard Lua has no command
to create directories, it must be present before running the tests.

testes/libs/P1/dummy

@@ -0,0 +1,2 @@
+# This is a dummy file just to make git keep the otherwise empty
+# directory 'P1' in the repository.