Update Stringtable.xml (PT-BR)

Fixes in PT-BR language and add RobPerson/DropFishingNet portuguese entry.
Merge pull request #188 from danielstuart14/patch-5

Update Stringtable.xml (PT-BR)
Fixed missing "<" in stringtable.xml, introduced in #184
Added localisation to fn_serviceTruck.sqf
Added additional localisation to fn_searchVehAction.sqf
Added additional localisation to fn_searchAction.sqf
Added additional localisation to fn_repairTruck.sqf
Added localisation to fn_pumpRepair.sqf
Added localisation to fn_suicideBomb.sqf
Fixed invalid characters in stringtable.xml for "STR_NOTF_SearchVeh"