Bump loopy, cgen and islpy to their 2016 versions

887cb5de · Dominic Kempf · 875bb3e4 · 716ea0fd · 2dec75c0 · 716ea0fd
Commit 887cb5de authored 8 years ago by Dominic Kempf
--- a/cgen @ 716ea0fd
+++ b/cgen @ 716ea0fd
-Subproject commit 2dec75c0849a25ee11f7bbb00e4259741be5254d
+Subproject commit 716ea0fda102bc5b829122dd578566ce42f37912
--- a/islpy @ 2e902bc3
+++ b/islpy @ 2e902bc3
-Subproject commit c7e8fbdeee009c58ba5c9f5e5d03fc53fcb37c5f
+Subproject commit 2e902bc3832be805a347f1016b583f78dbc9a188
--- a/loopy @ b3375f95
+++ b/loopy @ b3375f95
-Subproject commit 91568ee61ddb6ab97beb7c86e5166d01373286c8
+Subproject commit b3375f95b44990cea9c91b257f81d59b8d3bc50e