gitlab: ensure GitLab.dll is signed and packaged

Add GitLab.dll to the set of files that need to be signed for Mac and
Windows builds, and ensure the binary is included in the Windows
installer.

Author: mjcheetham

src/osx/SignFiles.Mac/SignFiles.Mac.csproj

@@ -27,6 +27,7 @@
       $(OutDir)\GitHub.dll;
       $(OutDir)\GitHub.UI.dll;
       $(OutDir)\GitHub.UI.Shared.dll;
+      $(OutDir)\GitLab.dll;
       $(OutDir)\Microsoft.AzureRepos.dll;
       $(OutDir)\gcmcore.dll;">
       <Authenticode>Microsoft400</Authenticode>

src/windows/Installer.Windows/Setup.iss

@@ -112,6 +112,7 @@ Source: "{#PayloadDir}\GitHub.dll";                                     DestDir:
 Source: "{#PayloadDir}\GitHub.UI.exe";                                  DestDir: "{app}"; Flags: ignoreversion
 Source: "{#PayloadDir}\GitHub.UI.exe.config";                           DestDir: "{app}"; Flags: ignoreversion
 Source: "{#PayloadDir}\GitHub.UI.Shared.dll";                           DestDir: "{app}"; Flags: ignoreversion
+Source: "{#PayloadDir}\GitLab.dll";                                     DestDir: "{app}"; Flags: ignoreversion
 Source: "{#PayloadDir}\Microsoft.AzureRepos.dll";                       DestDir: "{app}"; Flags: ignoreversion
 Source: "{#PayloadDir}\gcmcore.dll";                                    DestDir: "{app}"; Flags: ignoreversion
 Source: "{#PayloadDir}\gcmcoreui.dll";                                  DestDir: "{app}"; Flags: ignoreversion

src/windows/Payload.Windows/Payload.Windows.csproj

@@ -27,6 +27,7 @@
       $(OutDir)git-credential-manager-core.exe;
       $(OutDir)GitHub.dll;
       $(OutDir)GitHub.UI.exe;
+      $(OutDir)GitLab.dll;
       $(OutDir)Microsoft.AzureRepos.dll;
       $(OutDir)gcmcore.dll;
       $(OutDir)gcmcoreui.dll;