loader: Report STL usage as "none" due to our trimmed exports. (#332)

Author: rpavlik

changes/sdk/pr.332.gh.OpenXR-SDK-Source.md

@@ -0,0 +1,5 @@
+---
+- issue.1829.gl
+- issue.1831.gl
+---
+loader: Report STL usage as "none" in script-built Android AAR because we expose no C++ symbols.

src/loader/abi.json

@@ -2,5 +2,5 @@
     "abi": "@ANDROID_ABI@",
     "api": @CMAKE_SYSTEM_VERSION@,
     "ndk": @NDK_MAJOR_VERSION@,
-    "stl": "@ANDROID_STL@"
+    "stl": "none"
 }