kompexsqlite: needs threads and wchar

Wchar is used by the wrapper, fixes:
http://autobuild.buildroot.net/results/763/763d9aff86085b67077fc665e462cee81962246d/

Threads can be disabled by the sqlite build system, but since
kompexsqlite doesn't use the sqlite buildsystem and only uses a bundled
version it falls back to the default for *nixes (enabled), fixes:
http://autobuild.buildroot.net/results/c0b/c0b65be99603a2c2f07a38078f6b5622353915ca/



Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>