Merge #17545: build: remove libanl.so.1 from ALLOWED_LIBRARIES

ec89d2882a build: remove libanl.so.1 from ALLOWED_LIBRARIES (fanquake)

Pull request description:

  It should no longer be needed after: 10ae7a7b23.

  Symbol checker output for the `0.19.0.1` gitian built Linux binaries:
  ```bash
  aarch64  arm  i686-pc  risvc  symbol-check.py  x86_64
  root@557096f567b5:/test# find aarch64/ -type f -executable | xargs python3 symbol-check.py
  ['libpthread.so.0', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux-aarch64.so.1']
  ['libpthread.so.0', 'libfontconfig.so.1', 'libfreetype.so.6', 'libxcb.so.1', 'libdl.so.2', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux-aarch64.so.1']
  root@557096f567b5:/test# find arm -type f -executable | xargs python3 symbol-check.py
  ['libpthread.so.0', 'librt.so.1', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux-armhf.so.3']
  ['libpthread.so.0', 'librt.so.1', 'libfontconfig.so.1', 'libfreetype.so.6', 'libxcb.so.1', 'libdl.so.2', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux-armhf.so.3']
  root@557096f567b5:/test# find i686-pc -type f -executable | xargs python3 symbol-check.py
  ['libpthread.so.0', 'librt.so.1', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux.so.2']
  ['libpthread.so.0', 'librt.so.1', 'libfontconfig.so.1', 'libfreetype.so.6', 'libxcb.so.1', 'libdl.so.2', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux.so.2']
  root@557096f567b5:/test# find risvc/ -type f -executable | xargs python3 symbol-check.py
  ['libpthread.so.0', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux-riscv64-lp64d.so.1']
  ['libpthread.so.0', 'libfontconfig.so.1', 'libfreetype.so.6', 'libxcb.so.1', 'libdl.so.2', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux-riscv64-lp64d.so.1', 'libatomic.so.1']
  root@557096f567b5:/test# find x86_64/ -type f -executable | xargs python3 symbol-check.py
  ['libpthread.so.0', 'librt.so.1', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux-x86-64.so.2']
  ['libpthread.so.0', 'librt.so.1', 'libfontconfig.so.1', 'libfreetype.so.6', 'libxcb.so.1', 'libdl.so.2', 'libm.so.6', 'libgcc_s.so.1', 'libc.so.6', 'ld-linux-x86-64.so.2']
  ```

ACKs for top commit:
  laanwj:
    ACK, good catch ec89d2882a

Tree-SHA512: 6bc118da190a5c37d26f0dfad5d4661add2ef15525668efb93425423bddbddabf3d7d8809464e79691f517fbe2aab241678652b3dc55ec3f452cf0dcbc26057c

contrib/devtools/symbol-check.py

@@ -57,7 +57,6 @@ ALLOWED_LIBRARIES = {
 'libgcc_s.so.1', # GCC base support
 'libc.so.6', # C library
 'libpthread.so.0', # threading
-'libanl.so.1', # DNS resolve
 'libm.so.6', # math library
 'librt.so.1', # real-time (clock)
 'libatomic.so.1',