[XI] Bump mono for 15.5 SR5 (#3194)

зеркало из
Commit list for mono/mono: * mono/mono@6fcdbac844 [System]: Ensure WebConnection calls nstream.EndWrite() Diff: b293f45302...6fcdbac844
2018-01-10 11:28:55 -05:00 · 2018-01-10 11:28:55 -05:00 · db807ec992
--- a/external/mono
+++ b/external/mono
@ -1 +1 @@
-Subproject commit b293f453027bc075ce636988b383451e5c346347
+Subproject commit 6fcdbac8447604fb0a56cd866ad45e8f1916e7f2
		`@ -1 +1 @@`
			`Subproject commit b293f453027bc075ce636988b383451e5c346347`				`Subproject commit 6fcdbac8447604fb0a56cd866ad45e8f1916e7f2`