Make LargeAddressAware incremental (#1658)
Make LargeAddressAware incremental (#1658)

Unfortunately, we have two processes that run in sequence to modify the
output binary in place. This can happen:

* Initial compile
* First editbin
* First OpenSourceSign
* Second compile (skipped, up to date)
* Second editbin (runs, wasn't incremental before this commit)
* Second OpenSourceSign (runs, prior step makes it appear out of date)

The last OpenSourceSign then complains "this assembly is already
signed", breaking the build.

Fixes #1657 by treating editbin + OpenSourceSign as a unit for purposes
of incrementality.
jeffkl/msbuild,chipitsine/msbuild,cdmihai/msbuild,mono/msbuild,chipitsine/msbuild,rainersigwald/msbuild,mono/msbuild,Microsoft/msbuild,sean-gilliam/msbuild,Microsoft/msbuild,Microsoft/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,Microsoft/msbuild,cdmihai/msbuild,chipitsine/msbuild,jeffkl/msbuild,sean-gilliam/msbuild,cdmihai/msbuild,AndyGerlicher/msbuild,jeffkl/msbuild,cdmihai/msbuild,AndyGerlicher/msbuild,jeffkl/msbuild,sean-gilliam/msbuild,mono/msbuild,rainersigwald/msbuild,chipitsine/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild,mono/msbuild