fix atexit.  This is an overcomplex way of calling exit, but it is required, as the jit intercepts exit calls to implement atexit handlers.  This fixes SingleSource/UnitTests/2003-05-14-AtExit
fix atexit.  This is an overcomplex way of calling exit, but it is required,
as the jit intercepts exit calls to implement atexit handlers.  This
fixes SingleSource/UnitTests/2003-05-14-AtExit


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@33008 91177308-0d34-0410-b5e6-96231b3b80d8

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