Bump libfuzzer-sys from 0.4.7 to 0.4.9 (#472)

Bumps [libfuzzer-sys](https://github.com/rust-fuzz/libfuzzer) from 0.4.7
to 0.4.9.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/rust-fuzz/libfuzzer/blob/main/CHANGELOG.md">libfuzzer-sys's
changelog</a>.</em></p>
<blockquote>
<h2>0.4.9</h2>
<p>Released 2025-01-28.</p>
<h3>Added</h3>
<ul>
<li>The <code>example_init</code> demonstrates how to pass an
initialization code block to
the <code>fuzz_target!</code> macro.</li>
</ul>
<h3>Changed</h3>
<ul>
<li>The <code>fuzz_target!</code> macro now supports the generation of
<code>LLVMFuzzerInitialize</code>
to execute initialization code once before running the fuzzer. This
change is
not breaking and is completely backward compatible.</li>
</ul>
<hr />
<h2>0.4.8</h2>
<p>Released 2024-11-07.</p>
<h3>Added</h3>
<ul>
<li>Bindings to <code>LLVMFuzzerCustomCrossOver</code> through the
<code>fuzz_crossover</code>
macro. See the <code>example_crossover</code> directory in this crate's
repo for a
complete example.</li>
</ul>
<h3>Changed</h3>
<ul>
<li>Updated to <code>libFuzzer</code> commit
<code>ab51eccf88f5321e7c60591c5546b254b6afab99</code>
(<code>release/19.x</code>).</li>
</ul>
<hr />
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/4b077c206e8c256eca681678acd1e21f03e19fb6"><code>4b077c2</code></a>
Merge pull request <a
href="https://redirect.github.com/rust-fuzz/libfuzzer/issues/129">#129</a>
from fitzgen/bump-to-0.4.9</li>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/25e550ee603e49f337790563a9460adb9f9e4907"><code>25e550e</code></a>
Bump to version 0.4.9</li>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/bc6ea8b028596d2d8720031f1ec2ae8cc6f87049"><code>bc6ea8b</code></a>
Merge pull request <a
href="https://redirect.github.com/rust-fuzz/libfuzzer/issues/128">#128</a>
from zi0Black/support-for-LLVMFuzzerInitialize</li>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/55cb6cd124a626229a040f2b48cfde146a16f166"><code>55cb6cd</code></a>
fmt</li>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/916627d7812a350e5df0254c8d952866c2af9b6f"><code>916627d</code></a>
fix doc</li>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/57296bfe5cae4e78742e8eda0301b71cd68cd0fb"><code>57296bf</code></a>
Update init doc</li>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/36f2c111b3c65ea877895ede00e3f6b5a9366f79"><code>36f2c11</code></a>
Fixed compatibility with short |input|</li>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/162e810ec2122814508df4e8dc7e8e3bb0f9dbf6"><code>162e810</code></a>
Revert &quot;fixed type in doc&quot;</li>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/8188902671f89c78b4224de925520899bd1d28f5"><code>8188902</code></a>
fixed type in doc</li>
<li><a
href="https://github.com/rust-fuzz/libfuzzer/commit/006af9374b8df040efb9059e04186d7f4712bca6"><code>006af93</code></a>
fmt</li>
<li>Additional commits viewable in <a
href="https://github.com/rust-fuzz/libfuzzer/compare/0.4.7...0.4.9">compare
view</a></li>
</ul>
</details>
<br />


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</details>