Add individual contribution agreement
Add individual contribution agreement

This adds the contribution agreement required for individuals
to be able to submit changes to the Legato project. A separate
agreement is required for commercial entities to contribute.

Resolves: LE-5112
Change-Id: I3a69db6d8e2da8d7ada261e20d12ce7207a6d418

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af