Fix zlib-dependency in libnetapi.

* Fix copy-'n'paste bug that resulted in the zlib.h dependency being
  added to no source file at all.

src/kits/network/libnetapi/Jamfile

@@ -14,7 +14,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 		local sslSources ;
 		local md5Sources ;
 
-		Includes [ FGristFiles $(HPKG_SOURCES) ]
+		Includes [ FGristFiles HttpRequest.cpp ]
 			: [ BuildFeatureAttribute zlib : headers ] ;
 
 		UsePrivateSystemHeaders ;