Added encode testCases to check_buildin.c 
Added encode testCases to check_buildin.c 
bostjanv/open62541,AGIsmail/open62541,open62541/open62541,JGrothoff/open62541,AGIsmail/open62541,jpfr/open62541,StalderT/open62541,open62541/open62541,JGrothoff/open62541,jpfr/open62541,jpfr/open62541,StalderT/open62541,bostjanv/open62541,open62541/open62541,StalderT/open62541,JGrothoff/open62541,open62541/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541