update Qt 5.15.5

Author: stoeckerb

mysql/mysql.pro

@@ -3,19 +3,9 @@ TARGET = qsqlmysql
 HEADERS += $$PWD/qsql_mysql_p.h
 SOURCES += $$PWD/qsql_mysql.cpp $$PWD/main.cpp
 
-#QMAKE_USE += mysql
+QMAKE_USE += mysql
 
 OTHER_FILES += mysql.json
-load(qt_build_config)
-PLUGIN_CLASS_NAME = QMYSQLDriverPlugin
-include($$PWD/../qsqldriverbase.pri)
-
-
-contains(QT_ARCH, i386) {
-INCLUDEPATH += $$PWD/../../mysql-connector-c-6.1.11-win32\include
-LIBS += -L$$PWD/../../mysql-connector-c-6.1.11-win32\lib -llibmysql
-} else {
-INCLUDEPATH += $$PWD/../../mysql-connector-c-6.1.11-winx64\include
-LIBS += -L$$PWD/../../mysql-connector-c-6.1.11-winx64\lib -llibmysql
-}
 
+PLUGIN_CLASS_NAME = QMYSQLDriverPlugin
+include(../qsqldriverbase.pri)