redis: fix compilation on arm64

Closes: https://trac.macports.org/ticket/61808

databases/redis/Portfile

@@ -23,7 +23,8 @@ checksums           rmd160  590bec2469980b73e80286cfac7c23aa69d7a9a9 \
                     sha256  79bbb894f9dceb33ca699ee3ca4a4e1228be7fb5547aeb2f99d921e86c1285bd \
                     size    2271970
 
-patchfiles          patch-redis.conf.diff
+patchfiles          patch-redis.conf.diff \
+                    patch-arm64.diff
 
 post-patch {
     reinplace "s|@PREFIX@|${prefix}|g" ${worksrcpath}/redis.conf

databases/redis/files/patch-arm64.diff

@@ -0,0 +1,13 @@
+--- src/debug.c.orig	2021-02-07 02:40:15.441617896 -0500
++++ src/debug.c	2021-02-07 02:36:13.753866520 -0500
+@@ -53,6 +53,10 @@
+ #endif
+ #endif
+
++#if defined(__APPLE__) && defined(__arm64__) && defined(USE_JEMALLOC)
++#include <mach/mach.h>
++#endif
++
+ /* ================================= Debugging ============================== */
+
+ /* Compute the sha1 of string at 's' with 'len' bytes long.