[tools] Commit memory debug (et al) tooling

These are some changes I made to debug tooling while tracking down the
bugfix in the previous commit.

Each `scripts/debug_*_alloc.gdb` script has gdb output a `*_allocs.txt`
file, which in turn can be parsed by the `scripts/parse_*_allocs.py`
script to find errors.

.vscode/c_cpp_properties.json

@@ -3,12 +3,14 @@
         {
             "name": "Linux",
             "includePath": [
-                "${workspaceFolder}/**"
+                "${workspaceFolder}/src/libraries/**",
+                "${workspaceFolder}/build/**",
+                "${workspaceFolder}/sysroot/include"
             ],
             "defines": [],
             "compilerPath": "/usr/bin/clang",
             "cStandard": "c17",
-            "cppStandard": "c++14",
+            "cppStandard": "c++17",
             "intelliSenseMode": "linux-clang-x64",
             "compileCommands": "${workspaceFolder}/compile_commands.json"
         }