Add ptest support for 17 core system packages

[Copilot]

Implements ptest (package testing) infrastructure for 17 packages to enable runtime validation of installed functionality on target devices.

Packages Updated

Core System

• busybox - Enabled ptest unconditionally (changed from conditional benchmark_enable)
• kbd - Keyboard/console utilities with autotest harness
• libcap - POSIX capabilities functional tests

Compression & Text Processing

• xz_5.2.6 - XZ compression tests with path-corrected scripts
• zstd - Quick functional benchmarks (skips stress tests)
• lz4 - Compression/decompression validation
• gawk_3.1.5 - AWK test suite via Makefile
• grep - Pattern matching tests (excludes slow/locale-dependent)
• file - Magic database and file type detection

Libraries & Frameworks

• alsa-lib_1.2.6% - Audio library with 5 compiled test binaries
• libcheck - Unit testing framework validation
• libatomic-ops - Atomic operation primitives
• libpcap - Safe packet capture tests (no actual capture)
• libxslt - XSLT transformation with output normalization

Network & Security

• openssl_3.0.% - Comprehensive SSL/TLS tests with dynamic path fixing, provider installation, and MODULES.txt bug workaround
• curl_7.82% - HTTP client with test server automation

Build Tools

• make - Build system test harness via run_make_tests.pl

Implementation Pattern

Each package receives:

inherit ptest
SRC_URI += "file://run-ptest"

do_compile_ptest() {
    # Build test binaries
}

do_install_ptest() {
    # Install tests, data, helpers
}

RDEPENDS:${PN}-ptest += "bash ..."

Run-ptest scripts standardized to emit PASS:, FAIL:, or SKIP: prefixes for test result parsing.

Notable Details

• OpenSSL: Complex implementation handles configdata.pm path replacement, legacy provider fallback, and Perl module dependencies
• XZ: Patches test scripts to use installed binaries instead of build-time paths
• Curl: Includes certificate files and creates data directory symlink for test compatibility
• Grep: Skips 30+ problematic tests (performance, locale-dependent, infloop-prone)
• OpenSSL & libxslt: Use mktemp for temporary files instead of hardcoded /tmp paths

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