Set an env var when running jobs that points to the temp folder for the jobset output

kicad/jobs_runner.cpp

@@ -242,6 +242,8 @@ bool JOBS_RUNNER::RunJobsForDestination( JOBSET_DESTINATION* aDestination, bool
     int failCount = 0;
     int successCount = 0;
 
+    wxSetEnv( "JOBSET_OUTPUT_TMP_PATH", tempDirPath );
+
     for( const JOBSET_JOB& job : jobsForDestination )
     {
         if( m_reporter != nullptr )
@@ -271,6 +273,7 @@ bool JOBS_RUNNER::RunJobsForDestination( JOBSET_DESTINATION* aDestination, bool
 
         int result = CLI::EXIT_CODES::SUCCESS;
 
+
         if( iface < KIWAY::KIWAY_FACE_COUNT )
         {
             result = m_kiway->ProcessJob( iface, job.m_job.get(), reporterToUse );
@@ -328,6 +331,8 @@ bool JOBS_RUNNER::RunJobsForDestination( JOBSET_DESTINATION* aDestination, bool
         }
     }
 
+    wxUnsetEnv( "JOBSET_OUTPUT_TMP_PATH" );
+
     if( genOutputs )
         success &= aDestination->m_outputHandler->HandleOutputs( tempDirPath, m_project, outputs );