K2GO-446 fix(terminal): run iiab orchestrator through the interpreter

At targetSdk 35 Android W^X (neverallow app_data_file:file execute_no_trans)
blocks execve of a file in the app data dir, so the host shell could not run
the generated iiab script directly ("Permission denied") and iiab --login was
unreachable. Define iiab as a .mkshrc function that runs the script through
/system/bin/sh; read and interpret are allowed, only execute is blocked. The
ninja symlinks and proot run from nativeLibraryDir and are unaffected.

Author: luisguzman-adfa

controller/app/src/main/java/org/appdevforall/k2go/TerminalController.java

@@ -977,6 +977,10 @@ public void addNewSession() {
                 // persistent history would require replacing /system/bin/sh with a fuller
                 // shell (e.g. a bundled bash / busybox ash) — see ADFA-4709.
                 mkshrc.append("export HISTSIZE=5000\n");
+                // K2GO-446: targetSdk 35 W^X blocks execve of app-data-dir files, so run the
+                // generated iiab script through the interpreter instead of exec'ing it directly.
+                String iiabFnPath = new File(new File(workingDirectory, "usr/bin"), "iiab").getAbsolutePath();
+                mkshrc.append("iiab() { /system/bin/sh \"").append(iiabFnPath).append("\" \"$@\"; }\n");
                 fosMkshrc.write(mkshrc.toString().getBytes());
                 fosMkshrc.close();
             } catch (Exception e) {