added initial GLSL support to skslc

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) {
-#ifdef SK_BUILD_FOR_ANDROID
     std::stringstream buffer;
-    buffer << value;
+    buffer << std::setprecision(std::numeric_limits<T>::digits10) << value;
     return buffer.str();
-#else
-    return std::to_string(value);
-#endif
 }
 
 #if _MSC_VER
 #define NORETURN __declspec(noreturn)
 #else
 #define NORETURN __attribute__((__noreturn__))
 #endif
 int stoi(std::string s);
 
 double stod(std::string s);
@@ skipping 12 matching lines @@
 #define ASSERT_RESULT(x) x
 #endif
 
 #ifdef SKIA
 #define ABORT(...) { SkDebugf(__VA_ARGS__); sksl_abort(); }
 #else
 #define ABORT(...) { sksl_abort(); }
 #endif
 
 #endif