layout: restructure into src/ tests/ android/ scripts/ tools/

- extension/src/{port,platform,codepage} -> src/; native_render -> src/host
  (+ dxt, shaders/); libgr2 -> src/gr2; extension/third_party -> third_party
- extension/tests -> tests/port, libgr2/tests -> tests/gr2
- android-native -> android (build.sh, push-client.sh moved in)
- script -> scripts; tools/40250 -> tools/server; oracle -> tools/granny-oracle;
  perf tools -> tools/perf
- all build trees under build/ (native, release, android, port-gate)
- xrender:: CMake aliases -> mt::; port-map ledger impl paths rewritten

No code changes. ctest 15/15, port_gate macos+android PASS, port_map check 0 errors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

third_party/cpython-2.7.18/Python/frozen.c

@@ -0,0 +1,38 @@
+
+/* Dummy frozen modules initializer */
+
+#include "Python.h"
+
+/* In order to test the support for frozen modules, by default we
+   define a single frozen module, __hello__.  Loading it will print
+   some famous words... */
+
+/* To regenerate this data after the bytecode or marshal format has changed,
+   go to ../Tools/freeze/ and freeze the hello.py file; then copy and paste
+   the appropriate bytes from M___main__.c. */
+
+static unsigned char M___hello__[] = {
+    99,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
+    0,115,9,0,0,0,100,0,0,71,72,100,1,0,83,40,
+    2,0,0,0,115,14,0,0,0,72,101,108,108,111,32,119,
+    111,114,108,100,46,46,46,78,40,0,0,0,0,40,0,0,
+    0,0,40,0,0,0,0,40,0,0,0,0,115,8,0,0,
+    0,104,101,108,108,111,46,112,121,115,1,0,0,0,63,1,
+    0,0,0,115,0,0,0,0,
+};
+
+#define SIZE (int)sizeof(M___hello__)
+
+static struct _frozen _PyImport_FrozenModules[] = {
+    /* Test module */
+    {"__hello__", M___hello__, SIZE},
+    /* Test package (negative size indicates package-ness) */
+    {"__phello__", M___hello__, -SIZE},
+    {"__phello__.spam", M___hello__, SIZE},
+    {0, 0, 0} /* sentinel */
+};
+
+/* Embedding apps may change this pointer to point to their favorite
+   collection of frozen modules: */
+
+struct _frozen *PyImport_FrozenModules = _PyImport_FrozenModules;