Add //third_party/sqlite to dirs_to_snapshot, remove net_sql.patch

third_party/sqlite/src/tool/mksqlite3h.tcl

 #!/usr/bin/tclsh
 #
 # This script constructs the "sqlite3.h" header file from the following
 # sources:
 #
 #   1) The src/sqlite.h.in source file.  This is the template for sqlite3.h.
 #   2) The VERSION file containing the current SQLite version number.
 #   3) The manifest file from the fossil SCM.  This gives use the date.
 #   4) The manifest.uuid file from the fossil SCM.  This gives the SHA1 hash.
 #
@@ skipping 47 matching lines @@
     break
   }
 }
 close $in
 
 # Set up patterns for recognizing API declarations.
 #
 set varpattern {^[a-zA-Z][a-zA-Z_0-9 *]+sqlite3_[_a-zA-Z0-9]+(\[|;| =)}
 set declpattern {^ *[a-zA-Z][a-zA-Z_0-9 ]+ \**sqlite3_[_a-zA-Z0-9]+\(}
 
-# Process the src/sqlite.h.in ext/rtree/sqlite3rtree.h files.
+# Force the output to use unix line endings, even on Windows.
+fconfigure stdout -translation lf
+
+set filelist [subst {
+  $TOP/src/sqlite.h.in
+  $TOP/ext/rtree/sqlite3rtree.h
+}]
+
+# Process the source files.
 #
-foreach file [list $TOP/src/sqlite.h.in $TOP/ext/rtree/sqlite3rtree.h] {
+foreach file $filelist {
   set in [open $file]
   while {![eof $in]} {
   
     set line [gets $in]
 
     # File sqlite3rtree.h contains a line "#include <sqlite3.h>". Omit this
     # line when copying sqlite3rtree.h into sqlite3.h.
     #
     if {[string match {*#include*<sqlite3.h>*} $line]} continue
   
@@ skipping 13 matching lines @@
   
     if {([regexp $varpattern $line] && ![regexp {^ *typedef} $line])
      || ([regexp $declpattern $line])
     } {
       set line "SQLITE_API $line"
     }
     puts $line
   }
   close $in
 }