Android can only run c-shared libraries which means that every
Gio program must create its window and event loop from an init
function.
The same applies to iOS but for a more benign reason: the gio tool
builds programs in c-archive mode for iOS and links the binary with
a Objective-C driver.
Allow Gio programs to run off its main function by linking to and
invoking main even from Android libraries and iOS ditto.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Elias Naur