Merge #15903: appveyor: Write @PACKAGE_NAME@ to config

faebd8c appveyor: Write @PACKAGE_NAME@ to config (MarcoFalke)

Pull request description:

  fix tests which are currently failing on appveyor after #15896

ACKs for commit faebd8:
  Sjors:
    utACK faebd8c if AppVeyor blesses it.
  ryanofsky:
    utACK faebd8c. Not following your own "Please provide clear motivation for your patch" advice maybe, but I gather the motivation is to fix tests which are currently failing on appveyor after #15896?

Tree-SHA512: 645cc9f82a4897659bfd41d0c645e21201c43bceb36a073e7fa9fff6d38e8190e7b23e44f77f18ecf3cd1794a9a11b8cabfb33d1a477e7417d839f9451b8253d

Author: MarcoFalke

.appveyor.yml

@@ -39,6 +39,7 @@ after_build:
 - ps:  clcache -z
 before_test:
 - ps:  ${conf_ini} = (Get-Content([IO.Path]::Combine(${env:APPVEYOR_BUILD_FOLDER}, "test", "config.ini.in")))
+- ps:  ${conf_ini} = ${conf_ini}.Replace("@PACKAGE_NAME@", "Bitcoin Core")
 - ps:  ${conf_ini} = ${conf_ini}.Replace("@abs_top_srcdir@", ${env:APPVEYOR_BUILD_FOLDER})
 - ps:  ${conf_ini} = ${conf_ini}.Replace("@abs_top_builddir@", ${env:APPVEYOR_BUILD_FOLDER})
 - ps:  ${conf_ini} = ${conf_ini}.Replace("@EXEEXT@", ".exe")