execsnoop no longer runs on Solaris 11.3

[athompso]

This issue is inherited from Brendan's code, so this is more documenting for the record, but...
In the master branch, execsnoop monitors two tracepoints on line 158: syscall::exec:return and syscall::exece:return.
In Solaris 11, syscall::exec:return is renamed to fbt:s10_brand_s10_exec:return. Therefore, the script does not run as-is in a Solaris 11 native zone (including the global zone). It should still work properly from inside a Solaris 10 branded zone.

[athompso]

(A patch will be forthcoming if I ever figure out how to detect this at runtime.)

[athompso]

Quick fix: remove syscall::exec:return from that line and leave syscall::exece:return.

Replacing it with s10_exec:return causes double output, as s10_exec in turn now merely calls syscall::exec.

[athompso]

Confirmed that the solaris 11.3 package "dtt-toolkit" is still covered by the CDDL per the License file included in said package. Package details here for preservation:

root@t4-1:~# pkg list dtrace-toolkit
NAME (PUBLISHER)                                  VERSION                    IFO
system/dtrace/dtrace-toolkit                      0.99-0.175.3.0.0.30.0      i--
root@t4-1:~# pkg info dtrace-toolkit
          Name: system/dtrace/dtrace-toolkit
       Summary: DTraceToolkit 0.99
   Description: The DTraceToolkit is a collection of useful, documented DTrace
                scripts
      Category: Development/System
         State: Installed
     Publisher: solaris
       Version: 0.99
 Build Release: 5.11
        Branch: 0.175.3.0.0.30.0
Packaging Date: 21 August, 2015 03:50:44 PM
          Size: 2.91 MB
          FMRI: pkg://solaris/system/dtrace/dtrace-toolkit@0.99,5.11-0.175.3.0.0.30.0:20150821T155044Z
root@t4-1:~# head /usr/dtrace/DTT/License

COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0


      1. Definitions.

            1.1. ▒Contributor▒ means each individual or entity that
            creates or contributes to the creation of Modifications.

            1.2. ▒Contributor Version▒ means the combination of the

[athompso]

Patch contained in Pull Request #4 (#4).