MXS-2732 Rename sqlite-src-3110100 to sqlite-src-3110100.old

Originally, the sqlite installation was imported into the MaxScale
repository in the one gigantic MaxScale 1.4 -> 2.0 commit.

Consequently, there is no import commit to compare to if you want
to extract all MaxScale specific changes. To make it simpler in the
future, sqlite will now be imported in a commit of its own.

query_classifier/qc_sqlite/sqlite-src-3110100.old/tool/tostr.tcl

@@ -0,0 +1,12 @@
+#!/usr/bin/tcl
+#
+# Convert input text into a C string
+#
+set in [open [lindex $argv 0] rb]
+while {![eof $in]} {
+  set line [gets $in]
+  if {[eof $in]} break;
+  set x [string map "\\\\ \\\\\\\\ \\\" \\\\\"" $line]
+  puts "\"$x\\n\""
+}
+close $in