vulkan/opengl: rename some vars and comments

Fixes: 159027425
Test: ./vulkan/scripts/code_generator.py and build
Change-Id: I23524a0c65d0c7c31e4dc3859ce7b979f9093553
Merged-In: I23524a0c65d0c7c31e4dc3859ce7b979f9093553
diff --git a/vulkan/libvulkan/code-generator.tmpl b/vulkan/libvulkan/code-generator.tmpl
index a5a0405..f3e6ebd 100644
--- a/vulkan/libvulkan/code-generator.tmpl
+++ b/vulkan/libvulkan/code-generator.tmpl
@@ -1137,7 +1137,7 @@
   {{if not (GetAnnotation $ "pfn")}}
     {{$ext := GetAnnotation $ "extension"}}
     {{if not $ext}}true
-    {{else if not (Macro "IsExtensionBlacklisted" $ext)}}true
+    {{else if not (Macro "IsExtensionBlocked" $ext)}}true
     {{end}}
   {{end}}
 {{end}}
@@ -1168,7 +1168,7 @@
   Emit "true" if an extension is unsupportable on Android.
 ------------------------------------------------------------------------------
 */}}
-{{define "IsExtensionBlacklisted"}}
+{{define "IsExtensionBlocked"}}
   {{$ext := index $.Arguments 0}}
   {{     if eq $ext "VK_KHR_display"}}true
   {{else if eq $ext "VK_KHR_display_swapchain"}}true