devel/jujutsu: fix build on big-endian architectures

While functions for converting to LE are suffixed _le, functions for converting to BE don't have any suffix:
error[E0599]: no method named `put_i16_be` found for struct `Vec<u8>` in the current scope
   --> /wrkdirs/usr/ports/devel/jujutsu/work/jj-0.19.0/cargo-crates/serde_bser-0.4.0/src/ser/mod.rs:136:22
    |
136 |         self.scratch.put_i16_be(v);
    |                      ^^^^^^^^^^
    |
help: there is a method `put_i16_le` with a similar name
    |
136 |         self.scratch.put_i16_le(v);
    |                      ~~~~~~~~~~

error[E0599]: no method named `put_i32_be` found for struct `Vec<u8>` in the current scope

devel/jujutsu/files/patch-cargo-crates_serde__bser-0.4.0_src_ser_mod.rs

@@ -0,0 +1,38 @@
+--- cargo-crates/serde_bser-0.4.0/src/ser/mod.rs.orig	2024-07-30 20:40:15 UTC
++++ cargo-crates/serde_bser-0.4.0/src/ser/mod.rs
+@@ -133,7 +133,7 @@ where
+         #[cfg(target_endian = "little")]
+         self.scratch.put_i16_le(v);
+         #[cfg(target_endian = "big")]
+-        self.scratch.put_i16_be(v);
++        self.scratch.put_i16(v);
+     }
+
+     #[inline]
+@@ -143,7 +143,7 @@ where
+         #[cfg(target_endian = "little")]
+         self.scratch.put_i32_le(v);
+         #[cfg(target_endian = "big")]
+-        self.scratch.put_i32_be(v);
++        self.scratch.put_i32(v);
+     }
+
+     #[inline]
+@@ -153,7 +153,7 @@ where
+         #[cfg(target_endian = "little")]
+         self.scratch.put_i64_le(v);
+         #[cfg(target_endian = "big")]
+-        self.scratch.put_i64_be(v);
++        self.scratch.put_i64(v);
+     }
+ }
+
+@@ -255,7 +255,7 @@ where
+         #[cfg(target_endian = "little")]
+         self.scratch.put_f64_le(v);
+         #[cfg(target_endian = "big")]
+-        self.scratch.put_f64_be(v);
++        self.scratch.put_f64(v);
+         Ok(())
+     }
+