First attempt to add json1 and fts5 to the amalgamation.  This check-in does
not compile.

FossilOrigin-Name: d820a1bd1b8dd702d1b3a099af393530cc5a5d51
diff --git a/src/main.c b/src/main.c
index fa374c7..43d2efc 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2872,12 +2872,19 @@
   }
 #endif
 
-#ifdef SQLITE_ENABLE_FTS3
+#ifdef SQLITE_ENABLE_FTS3 /* automatically defined by SQLITE_ENABLE_FTS4 */
   if( !db->mallocFailed && rc==SQLITE_OK ){
     rc = sqlite3Fts3Init(db);
   }
 #endif
 
+#ifdef SQLITE_ENABLE_FTS5
+  if( !db->mallocFailed && rc==SQLITE_OK ){
+    extern int sqlite3Fts5Init(sqlite3*);
+    rc = sqlite3Fts5Init(db);
+  }
+#endif
+
 #ifdef SQLITE_ENABLE_ICU
   if( !db->mallocFailed && rc==SQLITE_OK ){
     rc = sqlite3IcuInit(db);