sys-fs/dwarfs: fixed build with boost 1.77.0-r3

See https://github.com/mhx/dwarfs/issues/57

Package-Manager: Portage-3.0.28, Repoman-3.0.3
Signed-off-by: Denis Reva <denis7774@gmail.com>

sys-fs/dwarfs/files/dwarfs-0.5.6-mutex.patch

@@ -0,0 +1,12 @@
+diff --git a/src/dwarfs/block_compressor.cpp b/src/dwarfs/block_compressor.cpp
+index 9cdcdb9..c2219c5 100644
+--- a/src/dwarfs/block_compressor.cpp
++++ b/src/dwarfs/block_compressor.cpp
+@@ -26,6 +26,7 @@
+ #include <cstring>
+ #include <iterator>
+ #include <memory>
++#include <mutex>
+ #include <unordered_map>
+ 
+ #include <sys/types.h>