Fix library detection for luasandbox

Author: shivammathur

extension/BuildPhpExtension/private/Get-LibrariesFromConfig.ps1

@@ -115,6 +115,9 @@ Function Get-LibrariesFromConfig {
         if($Extension -eq 'parallel') {
             $foundItems += 'pthreads'
         }
+        if($Extension -eq "luasandbox") {
+            $foundItems = @("lua-5.1")
+        }
 
         $highestVersions = @{}