Fix loadOpenGLLibrary for web targets (#875)

skiko/src/commonMain/kotlin/org/jetbrains/skiko/OsArch.kt

@@ -43,6 +43,7 @@ enum class KotlinBackend(val id: String) {
     fun isNotJs() = this != JS
 }
 
+// Note: it returns the host OS for web apps too
 expect val hostOs: OS
 
 expect val hostArch: Arch

skiko/src/jsWasmMain/kotlin/org/jetbrains/skiko/Actuals.js.kt

@@ -32,3 +32,7 @@ internal actual fun getCursorById(id: PredefinedCursorsId): Cursor =
         PredefinedCursorsId.HAND -> "pointer"
         PredefinedCursorsId.TEXT -> "text"
     }
+
+internal actual fun loadOpenGLLibrary() {
+   // Nothing to do here
+}
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