initial checkin of SkSL compiler

gyp/sksl.gypi

Index: gyp/sksl.gypi
diff --git a/gyp/sksl.gypi b/gyp/sksl.gypi
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index 0000000000000000000000000000000000000000..be2e715e8c3013deec8ef95d667848c62868b05a
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+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+{
+  'include_dirs': [
+    '../include',
+    '../include/config',
+    '../include/core',
+    '../include/private',
+    '../src/sksl',
+  ],
+  'sources': [
+    '../src/sksl/SkSLCompiler.cpp',
+    '../src/sksl/SkSLIRGenerator.cpp',
+    '../src/sksl/SkSLParser.cpp',
+    '../src/sksl/SkSLSPIRVCodeGenerator.cpp',
+    '../src/sksl/SkSLUtil.cpp',
+    '../src/sksl/ir/SkSLSymbolTable.cpp',
+    '../src/sksl/ir/SkSLType.cpp',
+  ],
+}