feat: add lab-rv32i-c-smalloc-sbrk-libc card

tests/check_archive_maps.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
+task01_map="$root/build/task01_libc_without_heap/prog.map"
+task05_map="$root/build/task05_picolibc_malloc/prog.map"
+
+grep -q 'libc.a(strlen.c.o)' "$task01_map"
+if grep -Eq 'libc_stdlib_malloc.c.o|libc_stdlib_free.c.o|libc_misc_picosbrk.c.o' "$task01_map"; then
+  echo 'FAIL Task01: heap-related archive member entered the image' >&2
+  exit 1
+fi
+
+for member in libc_stdlib_malloc.c.o libc_stdlib_free.c.o libc_misc_picosbrk.c.o; do
+  grep -q "$member" "$task05_map"
+done
+
+printf '%s\n' \
+  'PASS Task01 map: strlen.c.o present, malloc/free/picosbrk absent' \
+  'PASS Task05 map: malloc/free/picosbrk archive members present'
+