Fix header inclusion order in pg_receivewal.c

lz4frame.h was getting declared after the headers specific to Postgres,
but it needs to be included between postgres_fe.h and the internal
headers.

Issue introduced by babbbb5.

Reported-by: Justin Prysby
Discussion: https://postgr.es/m/20220317111220.GI28503@telsasoft.com

src/bin/pg_basebackup/pg_receivewal.c

@@ -19,6 +19,10 @@
 #include <signal.h>
 #include <sys/stat.h>
 #include <unistd.h>
+
+#ifdef USE_LZ4
+#include <lz4frame.h>
+#endif
 #ifdef HAVE_LIBZ
 #include <zlib.h>
 #endif
@@ -32,10 +36,6 @@
 #include "receivelog.h"
 #include "streamutil.h"
 
-#ifdef USE_LZ4
-#include "lz4frame.h"
-#endif
-
 /* Time to sleep between reconnection attempts */
 #define RECONNECT_SLEEP_TIME 5