Update clean_tarball.sh

warning against removing sqlite. it is used with Linux with cmake switch on CentOS6
USE_OUR_OWN_SQLITE3=TRUE

admin/linux/clean_tarball.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 rm -vrf admin/
-rm -vrf src/3rdparty/sqlite3
+rm -vrf src/3rdparty/sqlite3   # FIXME: For CentOS6 we have to use our bundled sqlite
 rm -vrf binary/
 rm -vrf src/3rdparty/libcrashreporter-qt
 rm -vrf shell_integration/windows