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/tool/warnings-clang.sh

@@ -1,14 +0,0 @@
-#/bin/sh
-#
-# Run this script in a directory with a working makefile to check for 
-# compiler warnings in SQLite.
-#
-rm -f sqlite3.c
-make sqlite3.c
-echo '************* FTS4 and RTREE ****************'
-scan-build gcc -c -DHAVE_STDINT_H -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_RTREE \
-      -DSQLITE_DEBUG -DSQLITE_ENABLE_STAT3 sqlite3.c 2>&1 | grep -v 'ANALYZE:'
-echo '********** ENABLE_STAT3. THREADSAFE=0 *******'
-scan-build gcc -c -I. -DSQLITE_ENABLE_STAT3 -DSQLITE_THREADSAFE=0 \
-      -DSQLITE_DEBUG \
-      sqlite3.c ../sqlite/src/shell.c -ldl 2>&1 | grep -v 'ANALYZE:'