8006082: Provide option to run octane benchmarks in separate processes

Reviewed-by: lagergren, jlaskey
diff --git a/nashorn/make/project.properties b/nashorn/make/project.properties
index e1e7761..37c8f83 100644
--- a/nashorn/make/project.properties
+++ b/nashorn/make/project.properties
@@ -156,13 +156,18 @@
 # test root for octane
 octane-test-sys-prop.test.js.roots=${test.external.dir}/octane/
 
+# run octane benchmars in separate processes?
+octane-test-sys-prop.separate.process=true
+
 # framework root for octane
 octane-test-sys-prop.test.js.framework=${test.basic.dir}/run-octane.js
 
 # list of tests to be excluded
+# mandreel excluded due to OOM
 octane-test-sys-prop.test.js.exclude.list=\
     base.js \
-    run.js
+    run.js  \
+    mandreel.js
 
 # test root for sunspider
 sunspider-test-sys-prop.test.js.roots=${test.external.dir}/sunspider/tests/sunspider-1.0/