Revert "gmain: only signal GWakeup right before or during a blocking poll"
This reverts commit 9ba95e25. It is causing undiagnosed problems with WebKit and other users of GLib. See https://bugzilla.gnome.org/show_bug.cgi?id=761102#c44 and https://bugzilla.gnome.org/show_bug.cgi?id=761102#c46. Reverting it until someone works out what the problem is. https://bugzilla.gnome.org/show_bug.cgi?id=761102
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e9757096