Utils: Introduce sleep function

Use it in Android plugin

Change-Id: Id3ae707d5425e99a2e5b993e1ed98dddd73809a9
Reviewed-by: hjk <hjk121@nokiamail.com>
Valgrind: Initialize custom settings with global settings

...fixes "** Error: no valgrind executable set **" for new projects.

Change-Id: I838d680d902480906fab7bec0984d45c25ec7b4b
Reviewed-by: hjk <hjk121@nokiamail.com>
Valgrind: Projects: Use global settings per default

...in order to avoid "huch, it shows custom settings, but I haven't
customized anything?!".

Change-Id: I80475340202b54acbf7fbb0fe709b1e9f1cf58da
Reviewed-by: hjk <hjk121@nokiamail.com>
Valgrind: Do not ignore/overwrite tool options

...otherwise all the options the user has set are in vain.

Change-Id: I6f344aafa848e3216a8ebf98e6fdddac26af4749
Reviewed-by: hjk <hjk121@nokiamail.com>