build: Add -no-mimetype-database option to qt package in depends

We do not use the `QMimeDatabase` class, and this change gets rid of
perl dependency.
Available since Qt 5.13.0.

depends/packages/qt.mk

@@ -56,6 +56,7 @@ $(package)_config_opts += -no-linuxfb
 $(package)_config_opts += -no-libjpeg
 $(package)_config_opts += -no-libproxy
 $(package)_config_opts += -no-libudev
+$(package)_config_opts += -no-mimetype-database
 $(package)_config_opts += -no-mtdev
 $(package)_config_opts += -no-openssl
 $(package)_config_opts += -no-openvg