2015: change http to https, and fix broken links.

Change-Id: I39f2b7f3f3048b46ed0c0c923658f541b597aaa0
Reviewed-on: https://go-review.googlesource.com/12383
Reviewed-by: Francesc Campoy Flores <campoy@golang.org>
diff --git a/2015/gophercon-go-on-mobile.slide b/2015/gophercon-go-on-mobile.slide
index 58a48ac..0e5fed9 100644
--- a/2015/gophercon-go-on-mobile.slide
+++ b/2015/gophercon-go-on-mobile.slide
@@ -69,9 +69,9 @@
 
 golang.org/x/mobile/...
 
-- [[http://golang.org/x/mobile/app][app: App control]]
-- [[http://golang.org/x/mobile/asset][asset: Asset management]]
-- [[http://golang.org/x/mobile/gl][gl: OpenGL ES 2]]
+- [[https://golang.org/x/mobile/app][app: App control]]
+- [[https://golang.org/x/mobile/asset][asset: Asset management]]
+- [[https://golang.org/x/mobile/gl][gl: OpenGL ES 2]]
 - [[https://golang.org/x/mobile/event][event: Events]]
 - [[https://golang.org/x/mobile/geom][geom: Screen geometry]]
 
@@ -122,7 +122,7 @@
 
 Functions marked with `//export` cgo annotations are callable.
 
-.link http://golang.org/s/execmodes
+.link https://golang.org/s/execmodes
 
 * Working with Foreign Languages
 
@@ -139,7 +139,7 @@
 
 Defines the language binding from exported Go APIs; no explicit annotation
 
-Currently supports a [[http://golang.org/x/mobile/cmd/gobind][subset of Go types]]
+Currently supports a [[https://golang.org/x/mobile/cmd/gobind][subset of Go types]]
 
 
 * Binding Functions, Basic Types & Errors
@@ -268,7 +268,7 @@
 * Ivy apps
 
 .image gophercon-go-on-mobile/ivymobile.png 300 _
-.caption Ivy logo by [[http://www.reneefrench.com][Renée French]]
+.caption Ivy logo by [[https://www.reneefrench.com][Renée French]]
 .link https://play.google.com/store/apps/details?id=org.golang.ivy Google Play Store
 .link https://itunes.apple.com/us/app/ivy-big-number-calculator/id1012116478 Apple App Store
 
@@ -301,13 +301,13 @@
 
 Experimental support for iOS (`arm,arm64`)
 
-iOS builder 
+iOS builder
 
 * Go 1.5: Go programs as libraries
 
 Can call Go functions from foreign language in a clean way
 
-.link golang.org/s/execmodes
+.link https://golang.org/s/execmodes
 
 * Go 1.5: Better tools & more packages