FFI: Fix 64 bit shift fold rules. #337

Job	Run time
test-tarantool-integration / tarantool / build	5m 45s
test-tarantool-integration / memcached / run_tests	1m 46s
test-tarantool-integration / expirationd / run_tests	3m 6s
test-tarantool-integration / metrics / run_tests	1m 6s
test-tarantool-integration / smtp / run_tests	10s
test-tarantool-integration / avro-schema / run_tests	7s
test-tarantool-integration / vshard / run_tests	6m 19s
test-tarantool-integration / mysql / run_tests	42s
test-tarantool-integration / queue / run_tests	2m 54s
test-tarantool-integration / php-queue / run_tests	1m 31s
test-tarantool-integration / php-client / run_tests	1m 4s
test-tarantool-integration / go-tarantool / run_tests	2m 24s
test-tarantool-integration / tarantool-c / run_tests	32s
test-tarantool-integration / tarantool-python / run_tests	3m 15s
test-tarantool-integration / checks / run_tests	45s
test-tarantool-integration / crud / run_tests	13m 6s
test-tarantool-integration / ddl / run_tests	58s
test-tarantool-integration / etcd-client / run_tests (v3.4.30)	4m 57s
test-tarantool-integration / etcd-client / run_tests (v3.5.12)	4m 50s
	55m 17s

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