Merge vulkancts/vulkan-cts-1.0.2 into vulkancts/vulkan-cts-1.0.2-extensions

Change-Id: Ic1ed6a7a99ef999c542677136bbf87f7a3085f84
diff --git a/external/fetch_sources.py b/external/fetch_sources.py
index bec7ae4..77deb60 100644
--- a/external/fetch_sources.py
+++ b/external/fetch_sources.py
@@ -173,9 +173,9 @@
 
 PACKAGES = [
 	SourcePackage(
-		"http://zlib.net/zlib-1.2.10.tar.gz",
-		"zlib-1.2.10.tar.gz",
-		"8d7e9f698ce48787b6e1c67e6bff79e487303e66077e25cb9784ac8835978017",
+		"http://zlib.net/zlib-1.2.11.tar.gz",
+		"zlib-1.2.11.tar.gz",
+		"c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1",
 		"zlib"),
 	SourcePackage(
 		"http://prdownloads.sourceforge.net/libpng/libpng-1.6.27.tar.gz",