Add vulkan files into skia repo.

tools/generate_vk_interface.sh

Index: tools/generate_vk_interface.sh
diff --git a/tools/generate_vk_interface.sh b/tools/generate_vk_interface.sh
new file mode 100644
index 0000000000000000000000000000000000000000..84eaee3b8ea7083bb20c4f18bc468d9cb024c8fe
--- /dev/null
+++ b/tools/generate_vk_interface.sh
@@ -0,0 +1,34 @@
+# Copyright 2015 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+headerLoc=../third_party/vulkan/vulkan.h
+outFile=tempVkInterface
+
+if [ ! -e "$outFile" ] ; then
+    echo 'I AM HERE'
+    touch "$outFile"
+fi
+
+chmod 700 $outFile
+
+echo '// *******************************************' > $outFile
+echo '// Place these lines into GrVkInterface.cpp::validate' >> $outFile
+echo '// *******************************************' >> $outFile
+sed -n 's/^VKAPI_ATTR \(VkResult\|void\) VKAPI_CALL vk\([a-zA-Z]*\).*/NULL == fFunctions.f\2 ||/p' $headerLoc >> $outFile
+sed -i '1,/NULL/ s/^NULL/if (NULL/' $outFile
+sed -i '5,$ s/^/    /' $outFile
+sed -i '$ s/ ||/) {/' $outFile
+
+echo '' >> $outFile
+echo '// *******************************************' >> $outFile
+echo '// Place these lines into GrVkInterface.h' >> $outFile
+echo '// *******************************************' >> $outFile
+sed -n 's/^VKAPI_ATTR \(VkResult\|void\) VKAPI_CALL vk\([a-zA-Z]*\).*/VkPtr<PFN_vk\2> f\2;/p' $headerLoc >> $outFile
+
+echo '' >> $outFile
+echo '// *******************************************' >> $outFile
+echo '// Place these lines into GrVkInterface.cpp::GrVKCreateInterface' >> $outFile
+echo '// *******************************************' >> $outFile
+sed -n 's/^VKAPI_ATTR \(VkResult\|void\) VKAPI_CALL vk\([a-zA-Z]*\).*/GET_PROC(\2);/p' $headerLoc >> $outFile
+