[committed] exec-stack warning for test which wants executable stacks

[Nick Clifton]

Hi Jeff,

   Just FYI - I am also looking at adding in another warning.  This time for
   when the linker creates a PT_LOAD segment which has all of the RWX flags
   set.  At the moment my testing seems to show that it only causes problems
   when a custom linker script is used that defines its own program headers
   and does not provide separate headers for code and data.

Cheers
   Nick