Attempt to fix broken musl mmap in libevent (#91)

general/package/libevent-openipc/libevent-mbedtls.patch

@@ -1,3 +1,16 @@
+diff --git a/buffer.c b/buffer.c
+index 822d97a5..646763b4 100644
+--- a/buffer.c
++++ b/buffer.c
+@@ -3070,7 +3070,7 @@ evbuffer_file_segment_materialize(struct evbuffer_file_segment *seg)
+ 			offset_leftover = offset % page_size;
+ 			offset_rounded = offset - offset_leftover;
+ 		}
+-		mapped = mmap(NULL, length + offset_leftover,
++		mapped = mmap64(NULL, length + offset_leftover,
+ 		    PROT_READ,
+ #ifdef MAP_NOCACHE
+ 		    MAP_NOCACHE | /* ??? */
 diff --git a/bufferevent_mbedtls.c b/bufferevent_mbedtls.c
 index f42da2ae..61f448a2 100644
 --- a/bufferevent_mbedtls.c