lcdproc: needs dynamic library support

Fixes:
http://autobuild.buildroot.net/results/4ac/4ac625f4e888ba859a5867671664dc8d041ec9b9/
http://autobuild.buildroot.net/results/614/61450e889c3912e38e52759812fbb6ce03270788/
http://autobuild.buildroot.net/results/138/13800e3b52c9f6c84f85325710a59c7b3c04d0ee/
http://autobuild.buildroot.net/results/041/0410fb15e65561031453bedbc549ed82ce7bdc71/



And many more.

Lcdproc forces shared libraries for the drivers, so mark it as unavailable
for static only builds.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>