Add CHANGELOG entry for libbpf#1345

Add a CHANGELOG entry for pull request libbpf#1345, which adjusted
Program::attach_uprobe_multi_with_opts() to map an empty `func_pattern`
to a NULL pointer input to the underlying libbpf API, to enable
additional use cases.

Signed-off-by: Daniel Müller <deso@posteo.net>

Author: d-e-s-o

libbpf-rs/CHANGELOG.md

@@ -1,6 +1,8 @@
 Unreleased
 ----------
 - Added `MapCore::query_fdinfo` for querying map fdinfo
+- Adjusted `Program::attach_uprobe_multi_with_opts` to work with empty
+  `func_pattern`
 
 
 0.26.0

libbpf-rs/src/program.rs

@@ -1107,6 +1107,7 @@ impl<'obj> ProgramMut<'obj> {
         } = opts;
 
         let pattern = util::str_to_cstring(func_pattern.as_ref())?;
+        // TODO: We should push optionality into method signature.
         let pattern_ptr = if pattern.is_empty() {
             ptr::null()
         } else {