Disable PdbGit
Disable PdbGit

It looks like it wasn't working before, with the warning

```
.nuget\packages\pdbgit\3.0.41\tools\PdbGit.targets(9,5): warning : No source files found that are tracked in a git repo. [E:\A\_work\102\s\src\MSBuildTaskHost\MSBuildTaskHost.csproj]
```

And now it's producing many warnings like

```
C:\Users\raines\.nuget\packages\pdbgit\3.0.41\tools\PdbGit.targets(9,5): warning : File "s:\msbuild2\artifacts\obj\msbuildtaskhost\release\net35\msbuildtaskhost.version.cs" missing or changed since the PDB was compiled. [s:\msbuild2\src\MSBuildTaskHost\MSBuildTaskHost.csproj]
C:\Users\raines\.nuget\packages\pdbgit\3.0.41\tools\PdbGit.targets(9,5): warning : File "s:\msbuild2\src\framework\buildengineresult.cs" missing or changed since the PDB was compiled. [s:\msbuild2\src\MSBuildTaskHost\MSBuildTaskHost.csproj]
C:\Users\raines\.nuget\packages\pdbgit\3.0.41\tools\PdbGit.targets(9,5): warning : File "s:\msbuild2\src\framework\runinstaattribute.cs" missing or changed since the PDB was compiled. [s:\msbuild2\src\MSBuildTaskHost\MSBuildTaskHost.csproj]
```

rainersigwald/msbuild,Microsoft/msbuild,cdmihai/msbuild,chipitsine/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,cdmihai/msbuild,mono/msbuild,AndyGerlicher/msbuild,AndyGerlicher/msbuild,Microsoft/msbuild,sean-gilliam/msbuild,cdmihai/msbuild,jeffkl/msbuild,mono/msbuild,sean-gilliam/msbuild,chipitsine/msbuild,AndyGerlicher/msbuild,jeffkl/msbuild,rainersigwald/msbuild,Microsoft/msbuild,jeffkl/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,chipitsine/msbuild,mono/msbuild,cdmihai/msbuild,jeffkl/msbuild,mono/msbuild,chipitsine/msbuild,sean-gilliam/msbuild,Microsoft/msbuild