Fix clean build issues

- Add autoreconf step for bundled PCRE in wxWidgets build script
  (fixes automake version mismatch between 1.16.1 and 1.16.5)
- Fix apply-finalize.sh to use get-wasm-opt.sh for consistent tool paths
  (tools moved to build-wasm/tools/ in previous commit)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/build-wxuniversal-wasm.sh

@@ -103,6 +103,14 @@ if [ $NEEDS_CONFIGURE -eq 1 ]; then
     echo ""
     echo "=== Configuring ==="
 
+    # Regenerate autotools files in bundled PCRE to fix version mismatch
+    # The bundled PCRE was generated with automake 1.16.1 but build systems
+    # may have different versions. Running autoreconf ensures compatibility.
+    if command -v autoreconf &> /dev/null; then
+        echo "Regenerating autotools files for bundled PCRE..."
+        (cd "$WX_SOURCE/3rdparty/pcre" && autoreconf -fi 2>/dev/null || true)
+    fi
+
     # Ensure Emscripten's zlib port is built (works in Docker and on host)
     # This populates the cache sysroot with zlib.h and libz.a
     echo "Building Emscripten zlib port..."

scripts/common/apply-finalize.sh

@@ -9,15 +9,10 @@ set -e
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
 
-# Get wasm-emscripten-finalize from same Binaryen install as wasm-opt
-BINARYEN_DIR="${PROJECT_ROOT}/tools/binaryen-121"
-FINALIZE="${BINARYEN_DIR}/bin/wasm-emscripten-finalize"
-
-# Ensure Binaryen is downloaded
-if [ ! -x "${FINALIZE}" ]; then
-    echo "Downloading Binaryen v121..."
-    "${SCRIPT_DIR}/get-wasm-opt.sh" > /dev/null
-fi
+# Get wasm-opt path (this downloads Binaryen if needed)
+WASM_OPT=$("${SCRIPT_DIR}/get-wasm-opt.sh")
+BINARYEN_BIN=$(dirname "${WASM_OPT}")
+FINALIZE="${BINARYEN_BIN}/wasm-emscripten-finalize"
 
 INPUT_WASM="${1:-output/pcbnew.wasm}"
 OUTPUT_WASM="${2:-${INPUT_WASM}}"