Implement Math.log1p using port from fdlibm.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index a3b37421bb043b53ad12903175b92eba90da1b11..5cafb151d76792aebf584d831ef9e8ed6d76d858 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -2651,19 +2651,17 @@ Genesis::Genesis(Isolate* isolate,
                                   NONE).Assert();
 
     // Initialize trigonometric lookup tables and constants.
-    const int constants_size =
-        ARRAY_SIZE(fdlibm::TrigonometricConstants::constants);
+    const int constants_size = ARRAY_SIZE(fdlibm::MathConstants::constants);
     const int table_num_bytes = constants_size * kDoubleSize;
     v8::Local<v8::ArrayBuffer> trig_buffer = v8::ArrayBuffer::New(
         reinterpret_cast<v8::Isolate*>(isolate),
-        const_cast<double*>(fdlibm::TrigonometricConstants::constants),
-        table_num_bytes);
+        const_cast<double*>(fdlibm::MathConstants::constants), table_num_bytes);
     v8::Local<v8::Float64Array> trig_table =
         v8::Float64Array::New(trig_buffer, 0, constants_size);
 
     Runtime::DefineObjectProperty(
         builtins,
-        factory()->InternalizeOneByteString(STATIC_ASCII_VECTOR("kTrig")),
+        factory()->InternalizeOneByteString(STATIC_ASCII_VECTOR("kMath")),
         Utils::OpenHandle(*trig_table), NONE).Assert();
   }