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/ar_beos

@@ -0,0 +1,73 @@
+#!/bin/sh
+#
+#  Truly fake ar, using a directory to store object files.
+#
+#     Donn Cave, donn@oz.net
+
+usage='Usage: ar-fake cr libpython.dir obj.o ...
+       ar-fake d libpython.dir obj.o ...
+       ar-fake so libpython.dir libpython.so'
+
+case $# in
+0|1|2)
+        echo "$usage" >&2
+        exit 1
+        ;;
+esac
+
+command=$1
+library=$2
+shift 2
+
+case $command in
+cr)
+        if test -d $library
+        then :
+        else
+                mkdir $library
+        fi
+        if cp -p $* $library
+        then
+                #  To force directory modify date, create or delete a file.
+                if test -e $library/.tch
+                then rm $library/.tch
+                else echo tch > $library/.tch
+                fi
+                exit 0
+        fi
+        ;;
+d)
+        if test -d $library
+        then
+                cd $library
+                rm -f $*
+        fi
+        ;;
+so)
+        case $BE_HOST_CPU in
+        ppc)
+                #  In case your libpython.a refers to any exotic libraries,
+                #  mwld needs to know that here.  The following hack makes
+                #  a couple of assumptions about Modules/Makefile.  If it
+                #  doesn't work, you may as well add the necessary libraries
+                #  here explicitly instead.
+                extralibs=$(
+                        (cd Modules; make -f Makefile -n link) |
+                        sed -n 's/.*\.so \(.*\) -o python.*/\1/p'
+                )
+                mwld -xms -export pragma -nodup -o $1 $library/* $extralibs
+                ;;
+        x86)
+                ld -shared -soname $(basename $1) -o $1 $library/*
+                ;;
+        esac
+        status=$?
+        cd $(dirname $1)
+        ln -sf $PWD lib
+        exit $status
+        ;;
+*)
+        echo "$usage" >&2
+        exit 1
+        ;;
+esac