Windows user -> please test https://github.com/wraitii/0ad/tree/sm60
Two noteworthy changes:
- Proxies are update to the SM60 API, having an explicit reserved slot and a private slot, in which the 'proxy data' and the C++ object are stored. This fixes a debug assertion failure of SM52.
- The GC callback behaviour has changed slightly, and we should now only look for GC_SLICE_BEGIN and GC_SLICE_END calls (see D3137)
Other updates are largely minor:
- JSVOID->JSUNDEFINED
- Compartment behaviours update
- Bug 1308236 - avoid ambiguous comparison
- Bug 1421358, REFRESH_FRAME was removed. API is indicated in jsapi.h so use that
- ClassOps changes
- Minor tests touchups again