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/sqlite.pc.in

@@ -0,0 +1,13 @@
+# Package Information for pkg-config
+
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: SQLite
+Description: SQL database engine
+Version: @RELEASE@
+Libs: -L${libdir} -lsqlite
+Libs.private: @LIBS@
+Cflags: -I${includedir}