return a non-0 exit code when one or more builds failed

Author: srijken

Libraries/Build.ps1

@@ -1,6 +1,8 @@
 Push-Location $PSScriptRoot
 . .\Settings.ps1
 
+$anyError = $False
+
 ForEach ($p in $client_projects) {
     ForEach ($b in $client_build_configurations) {
         $isPclClient = ($($p.Name) -eq "Exceptionless.Portable") -or ($($p.Name) -eq "Exceptionless.Portable.Signed")
@@ -49,6 +51,9 @@ ForEach ($p in $client_projects) {
                         /p:TargetFrameworkVersionProperty="$($b.TargetFrameworkVersionProperty)" `
                         /t:"Rebuild"
         }
+		If (-not $?) {
+				$anyError = $True
+			}
 
         Write-Host "Finished building $($p.Name) ($($b.TargetFrameworkVersionProperty))" -ForegroundColor Yellow
     }
@@ -66,7 +71,13 @@ msbuild "$source_dir\Tests\Exceptionless.Tests.csproj" `
 		 /p:TargetFrameworkVersionProperty="NET40" `
 		 /p:TargetFrameworkProfile="" `
 		 /p:TargetPortable="false"
-
+If (-not $?) {
+	$anyError = $True
+}
 Write-Host "Finished building Client Tests" -ForegroundColor Yellow
 
-Pop-Location
+Pop-Location
+
+If ($anyError) {
+	exit 1
+}