Turned on SkSL->GLSL compiler

src/sksl/SkSLUtil.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
  
 #ifndef SKSL_UTIL
 #define SKSL_UTIL
 
 #include <iomanip>
 #include <string>
 #include <sstream>
 #include "stdlib.h"
 #include "assert.h"
 #include "SkTypes.h"    
 
 namespace SkSL {
 
 // our own definitions of certain std:: functions, because they are not always present on Android
 
-template <typename T> std::string to_string(T value) {
-    std::stringstream buffer;
-    buffer << std::setprecision(std::numeric_limits<T>::digits10) << value;
-    return buffer.str();
-}
+std::string to_string(double value);
+
+std::string to_string(int32_t value);
+
+std::string to_string(uint32_t value);
+
+std::string to_string(int64_t value);
+
+std::string to_string(uint64_t value);
 
 #if _MSC_VER
 #define NORETURN __declspec(noreturn)
 #else
 #define NORETURN __attribute__((__noreturn__))
 #endif
 int stoi(std::string s);
 
 double stod(std::string s);
 
@@ skipping 11 matching lines @@
 #define ASSERT_RESULT(x) x
 #endif
 
 #ifdef SKIA
 #define ABORT(...) { SkDebugf(__VA_ARGS__); sksl_abort(); }
 #else
 #define ABORT(...) { sksl_abort(); }
 #endif
 
 #endif