Add commdb and related ethernetced.xml file, and use it in the generic stem_rom.oby file
Note that this doesn't seem to make ethernet networking work, and it's probably necessary to run the ipconnmgmt dbcreator.exe as well to get
a fully working commdb.
file=\epoc32\release\ARMV5\urel\weatherinfo.exe "sys\bin\weatherinfo.exe"
data=\epoc32\data\Z\resource\apps\weatherinfo.RSC "resource\apps\weatherinfo.rsc"
data=\epoc32\data\Z\private\10003a3f\import\Apps\weatherinfo_reg.rsc "private\10003a3f\import\apps\weatherinfo_reg.rsc"