Merge bitcoin/bitcoin#25630: Add symlinks for hardcoded Makefiles in out of tree builds

9aeeb75cf9 Add symlinks for hardcoded Makefiles in out of tree builds (Pablo Greco)

Pull request description:

  When doing out of tree builds, some hardwired Makefiles are not symlinked, which makes it a bit more uncomfortable to run some instances of make.

  There's no "real" functionality loss without this patch because the symlinked files are just for quick access to thinks in the main Makefile

ACKs for top commit:
  hebasto:
    ACK 9aeeb75cf9, tested on Ubuntu 22.04.

Tree-SHA512: 656f73c387584cee34f66b3f95993267a40b915762949c7a84b73ba2ea8d37b7b5850733377110e0110ed2f7da64e6a5f9b303812080fe7815154dbb40c8a44c

configure.ac

@@ -1978,6 +1978,9 @@ AC_CONFIG_LINKS([test/functional/test_runner.py:test/functional/test_runner.py])
 AC_CONFIG_LINKS([test/fuzz/test_runner.py:test/fuzz/test_runner.py])
 AC_CONFIG_LINKS([test/util/test_runner.py:test/util/test_runner.py])
 AC_CONFIG_LINKS([test/util/rpcauth-test.py:test/util/rpcauth-test.py])
+AC_CONFIG_LINKS([src/qt/Makefile:src/qt/Makefile])
+AC_CONFIG_LINKS([src/qt/test/Makefile:src/qt/test/Makefile])
+AC_CONFIG_LINKS([src/test/Makefile:src/test/Makefile])
 
 dnl boost's m4 checks do something really nasty: they export these vars. As a
 dnl result, they leak into secp256k1's configure and crazy things happen.