Add fuzz seeds for sqlite shift operators

fuzz/fuzz_seeds/sqlite_2657_bitwise_shifts.sql

diff --git a/fuzz/fuzz_seeds/sqlite_2657_bitwise_shifts.sql b/fuzz/fuzz_seeds/sqlite_2657_bitwise_shifts.sql
new file mode 100644
index 0000000..efef409
--- /dev/null
+++ b/fuzz/fuzz_seeds/sqlite_2657_bitwise_shifts.sql
@@ -0,0 +1 @@
+SELECT a << 1, a >> 1, a | b << c, a << b >> c, a & b >> c, a << b + c, a + b << c, a >> b * c, a / b >> c, a << b = c, a = b >> c, a << (b & c) FROM t