Jemalloc updated to 4.4.0.

The original jemalloc source tree was modified to:

1. Remove the configure error that prevents nested builds.
2. Insert the Redis private Jemalloc API in order to allow the
Redis fragmentation function to work.

deps/jemalloc/test/stress/microbench.c

@@ -1,7 +1,8 @@
 #include "test/jemalloc_test.h"
 
 JEMALLOC_INLINE_C void
-time_func(timedelta_t *timer, uint64_t nwarmup, uint64_t niter, void (*func)(void))
+time_func(timedelta_t *timer, uint64_t nwarmup, uint64_t niter,
+    void (*func)(void))
 {
 	uint64_t i;