gfile: make_directory_with_parents race condition
gfile: make_directory_with_parents race condition

A race condition could cause g_file_make_directory_with_parents() to
fail with G_IO_ERROR_EXISTS despite the requested directory not
existing.

https://bugzilla.gnome.org/show_bug.cgi?id=719455

endlessm/glib,endlessm/glib,lukasz-skalski/glib,ieei/glib,Distrotech/glib,johne53/MB3Glib,lukasz-skalski/glib,lukasz-skalski/glib,krichter722/glib,tamaskenez/glib,tamaskenez/glib,Distrotech/glib,MathieuDuponchelle/glib,gale320/glib,johne53/MB3Glib,MathieuDuponchelle/glib,MathieuDuponchelle/glib,gale320/glib,cention-sany/glib,tchakabam/glib,MathieuDuponchelle/glib,ieei/glib,tchakabam/glib,lukasz-skalski/glib,Distrotech/glib,gale320/glib,krichter722/glib,endlessm/glib,mzabaluev/glib,cention-sany/glib,mzabaluev/glib,krichter722/glib,mzabaluev/glib,tamaskenez/glib,gale320/glib,tamaskenez/glib,lukasz-skalski/glib,krichter722/glib,ieei/glib,tchakabam/glib,mzabaluev/glib,endlessm/glib,Distrotech/glib,Distrotech/glib,johne53/MB3Glib,ieei/glib,cention-sany/glib,cention-sany/glib,tchakabam/glib,johne53/MB3Glib,cention-sany/glib,MathieuDuponchelle/glib,mzabaluev/glib,gale320/glib,krichter722/glib,ieei/glib,endlessm/glib,tamaskenez/glib,tchakabam/glib,johne53/MB3Glib,johne53/MB3Glib