Update GIFLIB to 5.1.4 DO NOT MERGE am: b95e3f65 am: 398d9360 am: 34ed1449 -s ours

mentioned in commit bd0b73df

mentioned in commit d78574c9

mentioned in commit 38f16f10

mentioned in commit dbb35363

mentioned in commit a061a123

mentioned in commit e23a47e3

mentioned in commit cd957457

mentioned in commit a731f0e9

mentioned in commit bba06ee3

mentioned in commit 6cfda56c

mentioned in commit 41803ae6

mentioned in commit 1bd0e93a