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/Include/pgenheaders.h

@@ -0,0 +1,43 @@
+#ifndef Py_PGENHEADERS_H
+#define Py_PGENHEADERS_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Include files and extern declarations used by most of the parser. */
+
+#include "Python.h"
+
+PyAPI_FUNC(void) PySys_WriteStdout(const char *format, ...)
+			Py_GCC_ATTRIBUTE((format(printf, 1, 2)));
+PyAPI_FUNC(void) PySys_WriteStderr(const char *format, ...)
+			Py_GCC_ATTRIBUTE((format(printf, 1, 2)));
+
+#define addarc _Py_addarc
+#define addbit _Py_addbit
+#define adddfa _Py_adddfa
+#define addfirstsets _Py_addfirstsets
+#define addlabel _Py_addlabel
+#define addstate _Py_addstate
+#define delbitset _Py_delbitset
+#define dumptree _Py_dumptree
+#define findlabel _Py_findlabel
+#define freegrammar _Py_freegrammar
+#define mergebitset _Py_mergebitset
+#define meta_grammar _Py_meta_grammar
+#define newbitset _Py_newbitset
+#define newgrammar _Py_newgrammar
+#define pgen _Py_pgen
+#define printgrammar _Py_printgrammar
+#define printnonterminals _Py_printnonterminals
+#define printtree _Py_printtree
+#define samebitset _Py_samebitset
+#define showtree _Py_showtree
+#define tok_dump _Py_tok_dump
+#define translatelabels _Py_translatelabels
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_PGENHEADERS_H */