6952330: Fix for 6933217 broke contract of StringBuffer.ensureCapacity
Summary: make sure to grow with size => size * 2 + 2
Reviewed-by: dholmes, chegar, ohair
6943915: Adjust jdk/test/Makefile to deal with .dll and .so libraries needing execute permissions
Summary: And adjustments to test problem list.
Reviewed-by: jjg