Account for suppression of exceptions

[twieman]

As discussed in our 11/28/2016 WG meeting, we will analyze all occurrences of CCI_REPORT_ERROR and CCI_REPORT_FATAL in the standard code and:

• Add a comment describing how suppression will be handled
• Add survival code if necessary and reasonable
• Add a hard abort if continuation is not possible

This does not gate a release for public review (it can come after).

[pah]

This issue is related to a similar hardening effort done in SystemC 2.3.2, see osci-wg/systemc#232.

Once merged, this will also add an extra function sc_core::sc_abort() to provide the hard, non-overridable abort for non-recoverable code paths.