[windows][core] Include what you use

include/mbgl/style/expression/parsing_context.hpp

@@ -5,6 +5,7 @@
 #include <mbgl/style/expression/type.hpp>
 #include <mbgl/style/conversion.hpp>
 
+#include <iterator>
 #include <map>
 #include <string>
 #include <vector>

src/mbgl/text/glyph.hpp

@@ -13,6 +13,7 @@
 #include <vector>
 #include <string>
 #include <map>
+#include <set>
 
 namespace mbgl {
 

src/mbgl/util/http_timeout.cpp

@@ -1,6 +1,7 @@
 #include <mbgl/util/http_timeout.hpp>
 #include <mbgl/util/constants.hpp>
 
+#include <algorithm>
 #include <cassert>
 
 namespace mbgl {