Update openxrs to fix jsoncpp compilation error (#215)

Update openxrs to get the fix for a cmake error: "requires target
'jsoncpp_interface' that is not in any export set" [1], and update call
to create_space() to take an API change [2] into account.

[1] https://github.com/Ralith/openxrs/issues/148
[2] d8ea5553d5

Cargo.toml

@@ -35,7 +35,7 @@ json = { version = "0.12.4", optional = true }
 json5 = "0.4.1"
 libc = "0.2.155"
 log = "0.4.21"
-openxr = { git = "https://github.com/Ralith/openxrs", rev = "6c7747aee678048642dc16aad8bab3d6961dce03", features = [
+openxr = { git = "https://github.com/Ralith/openxrs", rev = "d0afdd3365bc1e14de28f6a3a21f457e788a702e", features = [
   "static",
   "mint",
 ], optional = true }