Adjust submodule fetch settings.

Apparently a shallow fetch only gets the latest commit from tinyfiledialogs, so we need to fetch everything. The same doesn't seem to apply to libpng, despite both being on SourceForge.

Meanwhile, there's no reason not to do a shallow fetch for HashLink.

.gitmodules

@@ -57,7 +57,6 @@
 [submodule "project/lib/tinyfiledialogs"]
 	path = project/lib/tinyfiledialogs
 	url = https://git.code.sf.net/p/tinyfiledialogs/code
-	shallow = true
 [submodule "project/lib/efsw"]
 	path = project/lib/efsw
 	url = https://github.com/SpartanJ/efsw
@@ -81,3 +80,4 @@
 [submodule "project/lib/hashlink"]
 	path = project/lib/hashlink
 	url = https://github.com/HaxeFoundation/hashlink
+	shallow = true