hoat/mesh: Provisioning output count number should be at least 1
hoat/mesh: Provisioning output count number should be at least 1

When selecting a random count for blink, beep or vibrate, the Bluetooth
Mesh Profile Specification v1.0.1, section 5.4.2.4 states: "the device
shall select a random integer between 0 and 10 to the power of the
Authentication Size exclusive".

This means that if size is 1, the integer should be in the range 1-9,
while the implementation chose an integer in the range 0-9. Reduce the
range and add 1 to the num to correct this for these actions.

This is port of 3656f7f60972dc03aa00071d21028f7b582e7765

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble