Breakpad support for windows

[eakoli]

Updates Breakpad backend to support windows.

[jan-auer]

This is a potential duplicate to #278. @eakoli would you mind checking that PR -- we'd welcome comments or feedback ahead of merging it!

[Mixaill]

For me it is looks like duplicate of #278

But two things could be grabbed from this PR:

https://github.com/getsentry/sentry-native/pull/290/files#diff-042142541573eb3944ddb1a697442a5dR80

target_link_libraries(breakpad_client psapi)

is this required by MinGW? However, it may be due to unnecessary files in the project.

https://github.com/getsentry/sentry-native/pull/290/files#diff-c013c7e9443f2c2d3c00e5b66ee9c33aR178

google_breakpad::ExceptionHandler::HANDLER_ALL

So, do not sure how it supposed to work for sentry-native.
Is backend callback is responsible only for unhandled exception filtering or it should set _set_purecall_handler and _set_invalid_parameter_handler as well?

[jan-auer]

Is backend callback is responsible only for unhandled exception filtering or it should set _set_purecall_handler and _set_invalid_parameter_handler as well?

Given that there's no default on ExceptionHandler, we might want to expose this somehow. I'm pretty sure there are very compelling arguments both for and against the two additional handlers. Once we expand on the inproc backends, we might want to reuse that setting there as well.

This could be similar to the system crash reporter setting for now, which only has an effect on the Crashpad backend:

sentry-native/include/sentry.h

Lines 838 to 839 in 19ad6e7

	SENTRY_API void sentry_options_set_system_crash_reporter_enabled(
	sentry_options_t *opts, int enabled);

[Mixaill]

So in my PR I set it to register only UnhandledExceptionFilter to match Crashpad behavior.

[eakoli]

@Mixaill the psapi requirement was actually due to extra code that I didn't include in this pr.

We're currently using ming64 on linux, not via msys2, so were restricted to gcc, thus no pdbs.

We process the dwarf debug data produced by gcc and append extra cv records to the minidump that contain the code_id generated via the .text checksum like how the linux fall back is working. This code needed GetModuleFileNameEx, but I'm actually going to be reworking it such that its not needed.

[eakoli]

@Mixaill Your pr looks about the same as mine, little more polished =).

[Swatinem]

Closing this in favor of #278