Added windows implementation of backtrace.
Added unit test for backtrace.
Fixed missing include in unit test.
Enhanced debug output, fixed missing includes.
Fixed commented include.
Fixed scope of variable declarations, MSVC does not like mixed variable declaration.
Removed assert, breaking build on visual studio.
Fixed mixed variable declaration.
Fixed broken cliprdr TAG definition.
Added WINPR_API for backtrace functions.
Using fixed size debug string buffers now.
Merge pull request #2110 from akallabeth/winpr_backtrace_windows

Winpr backtrace windows