* Add basic Insurgency support on Windows x64
This allows SourceMod to load on x64 Insurgency. There are still a lot of variable truncation warnings that have to be dealt with.
* Fix 32bit builds
* Compile MySQL extension as well
The hack for __iob_func being removed from the core runtime, but required by the old mysql we're building against can be simplified a lot due to the `_ReturnAddress` intrinsic available since MSVC 2015.
* Don't include the offset we want to extract in the signature
SourceMod doesn't support Source 1 Dota 2 anymore and neither Source 2. Speed up CI by only cloning the hl2sdks that are tested.
This adds a `-s sdk1,sdk2` parameter to the checkout-deps.sh script similar to the `-SDKs` option of the powershell script to select specific sdks to update instead of all.
Our official builds use clang-3.4 (for macOS) and clang-3.8 for Linux.
Linux uses libstdc++-4.9. Make sure these two compilers are being tested
and that libstdc++-4.9 is being used for STL.
Add a macOS builder to get coverage there. This will use a newer
clang than we actually use, but as opposed to the linux builder will
test the platform-specific bits.
Finally, use the latest GCC and clang versions from a bionic image, so
we have some coverage of a popular distribution.
.sh version has this bit:
```
if [ $ismac -eq 0 ]; then
# Add these SDKs for Windows or Linux
sdks+=( orangebox blade episode1 bms )
# Add more SDKs for Windows only
if [ $iswin -eq 1 ]; then
sdks+=( darkm swarm bgt eye contagion )
fi
fi
```
Added these to the SDK list.
Strip line breaks when reading product.version, as Git can mangle the line breaks if autocrlf is configured, resulting in `SM_BUILD_TAG` getting defined with a linebreak.
(Piggy-backing off of Blade Symphony now instead of Alien Swarm.
They switched to Portal 2 engine so detects as Blade Symphony, and
both are pretty vanilla at the engine level.)
