[sqlite] Allow recover.c to compile independently.

third_party/sqlite/src/tool/mksqlite3c.tcl

 #!/usr/bin/tclsh
 #
 # To build a single huge source file holding all of SQLite (or at
 # least the core components - the test harness, shell, and TCL 
 # interface are omitted.) first do
 #
 #      make target_source
 #
 # The make target above moves all of the source code files into
 # a subdirectory named "tsrc".  (This script expects to find the files
@@ skipping 344 matching lines @@
 
    parse.c
 
    tokenize.c
    complete.c
 
    main.c
    notify.c
 
    recover.c
+   recover_varint.c

[Scott Hess - ex-Googler, 2016/03/02 01:12:08]

The overall script builds third_party/sqlite/amalgamation/sqlite3.c .

 
    fts3.c
    fts3_aux.c
    fts3_expr.c
    fts3_hash.c
    fts3_porter.c
    fts3_tokenizer.c
    fts3_tokenizer1.c
    fts3_tokenize_vtab.c
    fts3_write.c
    fts3_snippet.c
    fts3_unicode.c
    fts3_unicode2.c
 
    rtree.c
    icu.c
    fts3_icu.c
    sqlite3rbu.c
    dbstat.c
    json1.c
    fts5.c
 } {
   copy_file tsrc/$file
 }
 
 close $out