LLVM fails to resolve the __chkstck function for probing the stack when
it's larger than 4 kB. We don't need it for SwiftShader because newly
created threads have 1 MB of committed stack memory.

Bug b/115344057
Bug swiftshader:25

Change-Id: Ic6097376052b07ed6af950dfdac8499b5fc83053
Reviewed-on: https://swiftshader-review.googlesource.com/20688Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>