depends: Avoid warning: "_FORTIFY_SOURCE" redefined for libevent #32266

1. 
   hebasto commented at 3:23 pm on April 14, 2025: member

   On Alpine Linux 3.12.3, compiling the libevent package produces multiple warnings:

   0$ gmake -C depends -j $(nproc) libevent
   1<snip>
   2<command-line>: warning: "_FORTIFY_SOURCE" redefined
   3<built-in>: note: this is the location of the previous definition
   4<snip>
   

   This PR fixes these warnings.

2. depends: Avoid `warning: "_FORTIFY_SOURCE" redefined` for `libevent`

   On Alpine Linux 3.12.3, compiling the `libevent` package produces
   multiple warnings:
   ```
   $ gmake -C depends -j $(nproc) libevent
   <snip>
   <command-line>: warning: "_FORTIFY_SOURCE" redefined
   <built-in>: note: this is the location of the previous definition
   <snip>
   ```

   fe71a4b139
3. hebasto added the label Build system on Apr 14, 2025
4. 
   DrahtBot commented at 3:23 pm on April 14, 2025: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/32266.

   Reviews

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   Type	Reviewers
   ACK	shahsb

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5. 
   shahsb commented at 4:59 am on April 16, 2025: none

   concept ACK
6. 
   shahsb commented at 5:06 am on April 16, 2025: none

   ACK https://github.com/bitcoin/bitcoin/pull/32266/commits/fe71a4b139f3a142468c2e931775813bc8f9d2ad
7. maflcko added the label DrahtBot Guix build requested on Apr 16, 2025
8. 
   DrahtBot commented at 2:32 am on April 17, 2025: contributor

   Guix builds (on x86_64) [untrusted test-only build, possibly unsafe, not for production use]

   File	commit cdc32994feadf3f15df3cfac5baae36b4b011462(master)	commit 23c93027e731210ec49cab09b57f72869ab78ea2(pull/32266/merge)
   *-aarch64-linux-gnu-debug.tar.gz		cdf32224d5ff34cc...
   *-aarch64-linux-gnu.tar.gz		6e1681f42a3c1c32...
   *-arm-linux-gnueabihf-debug.tar.gz		681eb96b55fa0810...
   *-arm-linux-gnueabihf.tar.gz		6b242544b25bb8a5...
   *-arm64-apple-darwin-codesigning.tar.gz		968bf945d3fc9edb...
   *-arm64-apple-darwin-unsigned.tar.gz		d79ee2a2097c2b34...
   *-arm64-apple-darwin-unsigned.zip		915c63931b8f2c97...
   *-powerpc64-linux-gnu-debug.tar.gz		2547a2c7da236ae6...
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   *-x86_64-apple-darwin-codesigning.tar.gz		3bb3e6adfe45522d...
   *-x86_64-apple-darwin-unsigned.tar.gz		13c96cd7a9503524...
   *-x86_64-apple-darwin-unsigned.zip		eaaaedf72475ae1b...
   *-x86_64-linux-gnu-debug.tar.gz		64e36f8ccd2dfee4...
   *-x86_64-linux-gnu.tar.gz		a130bf087798147b...
   *.tar.gz		058000d52f1718bf...
   SHA256SUMS.part		09bb5ff23c7628d0...
   guix_build.log	056629295102080d...	7776af114a397f4a...
   guix_build.log.diff		27ccd5cc6b668612...

9. DrahtBot removed the label DrahtBot Guix build requested on Apr 17, 2025
10. DrahtBot added the label CI failed on Apr 28, 2025
11. DrahtBot removed the label CI failed on May 2, 2025

Contributors
hebasto DrahtBot shahsb

Labels
Build system