VS: Generate Nsight Tegra project revision number

Nsight Tegra 2.0 will be revision '8'.  Generate this revision number
and add a NsightTegraUpgradeOnceWithoutPrompt element to tell newer
versions not to prompt when upgrading the generated project file.
Merge topic 'vs-nsight-tegra-generator' into next

ddc5d69f VS: Generate Nsight Tegra project revision number