[Bug 706719] Quote autogen.sh arguments when passing to autogen_options

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=706719
  GStreamer | common | git

--- Comment #10 from Kerrick Staley <bugs at kerrickstaley.com> 2013-08-26 16:26:42 UTC ---
It's part of the POSIX sh spec:
http://pubs.opengroup.org/onlinepubs/009695399/utilities/sh.html

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