feat(userspace/apps/test/libc_test): add more tests

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/apps/test/libc_test/.vscode/launch.json

@@ -0,0 +1,30 @@
+{
+	// Use IntelliSense to learn about possible attributes.
+	// Hover to view descriptions of existing attributes.
+	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+	{
+		"name": "(gdb) Launch",
+		"type": "cppdbg",
+		"request": "launch",
+		"program": "${workspaceFolder}/libc_test_n.elf",
+		"targetArchitecture": "x64",
+		"stopAtEntry": false,
+		"cwd": "${workspaceFolder}",
+		"environment": [],
+		"externalConsole": false,
+		"MIMode": "gdb",
+		"miDebuggerPath": "/usr/bin/gdb",
+		"internalConsoleOptions": "neverOpen",
+		"setupCommands": [
+			{
+				"description": "Enable pretty-printing for gdb",
+				"text": "-enable-pretty-printing",
+				"ignoreFailures": true
+			}
+		],
+		"preLaunchTask": "run-make"
+	}
+	]
+}