Update EU4Province.cpp (#525)

* Update EU4Province.cpp

Added West African/Sub Saharan and East African tech so that they can see themselves.

* test

* Update EU4Province.cpp, pt. 2

This might fix it.

CK2ToEU4/Source/EU4World/Province/EU4Province.cpp

@@ -26,7 +26,7 @@ void EU4::Province::initializeFromCK2(std::shared_ptr<CK2::Province> origProvinc
 	 const mappers::ReligionMapper& religionMapper)
 {
 	srcProvince = std::move(origProvince);
-	details.discoveredBy = {"eastern", "western", "muslim", "ottoman", "indian", "nomad_group", "MGE"}; // hardcoding for now.
+	details.discoveredBy = {"eastern", "western", "muslim", "ottoman", "indian", "nomad_group", "east_african", "sub_saharan", "MGE"}; // hardcoding for now.
 
 	// If we're initializing this from CK2 provinces, then having an owner or being a wasteland/sea is a given -
 	// there are no uncolonized provinces in CK2.
@@ -165,4 +165,4 @@ void EU4::Province::sterilize()
 	details.isCity = false;
 	// not clearing province modifiers! We're leaving great wonders right there.
 	// not touching dev, CoTs and similar!
-}
+}