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/Lib/sunaudio.py

@@ -0,0 +1,49 @@
+"""Interpret sun audio headers."""
+from warnings import warnpy3k
+warnpy3k("the sunaudio module has been removed in Python 3.0; "
+         "use the sunau module instead", stacklevel=2)
+del warnpy3k
+
+
+MAGIC = '.snd'
+
+class error(Exception):
+    pass
+
+
+def get_long_be(s):
+    """Convert a 4-char value to integer."""
+    return (ord(s[0])<<24) | (ord(s[1])<<16) | (ord(s[2])<<8) | ord(s[3])
+
+
+def gethdr(fp):
+    """Read a sound header from an open file."""
+    if fp.read(4) != MAGIC:
+        raise error, 'gethdr: bad magic word'
+    hdr_size = get_long_be(fp.read(4))
+    data_size = get_long_be(fp.read(4))
+    encoding = get_long_be(fp.read(4))
+    sample_rate = get_long_be(fp.read(4))
+    channels = get_long_be(fp.read(4))
+    excess = hdr_size - 24
+    if excess < 0:
+        raise error, 'gethdr: bad hdr_size'
+    if excess > 0:
+        info = fp.read(excess)
+    else:
+        info = ''
+    return (data_size, encoding, sample_rate, channels, info)
+
+
+def printhdr(file):
+    """Read and print the sound header of a named file."""
+    hdr = gethdr(open(file, 'r'))
+    data_size, encoding, sample_rate, channels, info = hdr
+    while info[-1:] == '\0':
+        info = info[:-1]
+    print 'File name:  ', file
+    print 'Data size:  ', data_size
+    print 'Encoding:   ', encoding
+    print 'Sample rate:', sample_rate
+    print 'Channels:   ', channels
+    print 'Info:       ', repr(info)