Prefix build directory with a string

run-tests.php mangles sendmail_path if the directory starts with a digit

Author: shivammathur

php/BuildPhp/public/Invoke-PhpBuild.ps1

@@ -40,7 +40,7 @@ function Invoke-PhpBuild {
 
         $tempDirectory = [System.IO.Path]::GetTempPath()
 
-        $buildDirectory = [System.IO.Path]::Combine($tempDirectory, [System.Guid]::NewGuid().ToString())
+        $buildDirectory = [System.IO.Path]::Combine($tempDirectory, ("php-" + [System.Guid]::NewGuid().ToString()))
 
         New-Item "$buildDirectory" -ItemType "directory" -Force > $null 2>&1
 

php/BuildPhp/public/Invoke-PhpTests.ps1

@@ -47,7 +47,7 @@ function Invoke-PhpTests {
 
         $tempDirectory = [System.IO.Path]::GetTempPath()
 
-        $buildDirectory = [System.IO.Path]::Combine($tempDirectory, [System.Guid]::NewGuid().ToString())
+        $buildDirectory = [System.IO.Path]::Combine($tempDirectory, ("php-" + [System.Guid]::NewGuid().ToString()))
 
         $testsDirectory = "tests"