8335778: runtime/ClassInitErrors/TestStackOverflowDuringInit.java fails on ppc64 platforms after JDK-8334545

Reviewed-by: dholmes, asteiner

Author: MBaesken

test/hotspot/jtreg/runtime/ClassInitErrors/TestStackOverflowDuringInit.java

@@ -31,7 +31,7 @@
  * @requires vm.flagless
  * @comment Run with the smallest stack possible to limit the execution time.
  *          This is the smallest stack that is supported by all platforms.
- * @run main/othervm -Xss240K -Xint TestStackOverflowDuringInit
+ * @run main/othervm -Xss384K -Xint TestStackOverflowDuringInit
  */
 
 import java.io.ByteArrayOutputStream;