[oe] please stop updating efl SRCDATE, it breaks builds

[Koen Kooi]

Hi,

Everytime efl SRCDATE gets changed my builds start failing in do_fetch. 
This is caused by the cvs server only allowing one connection per host, 
so with using multithreaded bitbake I have to restart the build about 10 
times to get everything fetched. I have to disable the autobuilder 
everytime this happens since it would basically DoS bugzilla with 
do_fetch error reports :(

Please think of all this when wanting to bump SRCDATE the next time.

regards,

Koen