pass options to our gdb stub through miDebuggerArgs

[doudou]

Until now, we were using the environment array. It seems that the latest update started passing the environment through commands to the debugger instead of through the shell environment.

Passing it through miDebuggerArgs seems to be the right thing to do anyways.

[coveralls]

Pull Request Test Coverage Report for Build 116

• 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 79.443%

---

Totals
Change from base Build 114:	0.01%
Covered Lines:	1115
Relevant Lines:	1393

---

💛 - Coveralls