File Fix-library-link.patch of Package dtkcore

diff -Nur dtkcore-5.4.13/src/src.pro dtkcore-5.4.13-new/src/src.pro
--- dtkcore-5.4.13/src/src.pro	2021-03-22 11:30:44.000000000 +0800
+++ dtkcore-5.4.13-new/src/src.pro	2021-05-05 16:26:36.431155423 +0800
@@ -24,6 +24,8 @@
 include($$PWD/filesystem/filesystem.pri)
 include($$PWD/settings/settings.pri)
 
+LIBS += -ldl
+
 DTK_MODULE_NAME = $$TARGET
 load(dtk_build)