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/Modules/getbuildinfo.c

@@ -0,0 +1,67 @@
+#include "Python.h"
+
+#ifndef DONT_HAVE_STDIO_H
+#include <stdio.h>
+#endif
+
+#ifndef DATE
+#ifdef __DATE__
+#define DATE __DATE__
+#else
+#define DATE "xx/xx/xx"
+#endif
+#endif
+
+#ifndef TIME
+#ifdef __TIME__
+#define TIME __TIME__
+#else
+#define TIME "xx:xx:xx"
+#endif
+#endif
+
+/* XXX Only unix build process has been tested */
+#ifndef GITVERSION
+#define GITVERSION ""
+#endif
+#ifndef GITTAG
+#define GITTAG ""
+#endif
+#ifndef GITBRANCH
+#define GITBRANCH ""
+#endif
+
+const char *
+Py_GetBuildInfo(void)
+{
+    static char buildinfo[50 + sizeof(GITVERSION) +
+                          ((sizeof(GITTAG) > sizeof(GITBRANCH)) ?
+                           sizeof(GITTAG) : sizeof(GITBRANCH))];
+    const char *revision = _Py_gitversion();
+    const char *sep = *revision ? ":" : "";
+    const char *gitid = _Py_gitidentifier();
+    if (!(*gitid))
+        gitid = "default";
+    PyOS_snprintf(buildinfo, sizeof(buildinfo),
+                  "%s%s%s, %.20s, %.9s", gitid, sep, revision,
+                  DATE, TIME);
+    return buildinfo;
+}
+
+const char *
+_Py_gitversion(void)
+{
+    return GITVERSION;
+}
+
+const char *
+_Py_gitidentifier(void)
+{
+    const char *gittag, *gitid;
+    gittag = GITTAG;
+    if ((*gittag) && strcmp(gittag, "undefined") != 0)
+        gitid = gittag;
+    else
+        gitid = GITBRANCH;
+    return gitid;
+}