Revert of Pull define for version out into v8-version.h and separate build target

src/version.cc

Index: src/version.cc
diff --git a/src/version.cc b/src/version.cc
index 67535cbe6d59c20324274d71a8b7adb6aef77862..7305bf2576ef49a0da53d97630899d2732f6e237 100644
--- a/src/version.cc
+++ b/src/version.cc
@@ -12,6 +12,25 @@
 // number. This define is mainly used by the build system script.
 #define SONAME            ""
 
+#if V8_IS_CANDIDATE_VERSION
+#define CANDIDATE_STRING " (candidate)"
+#else
+#define CANDIDATE_STRING ""
+#endif
+
+#define SX(x) #x
+#define S(x) SX(x)
+
+#if V8_PATCH_LEVEL > 0
+#define VERSION_STRING                                                      \
+  S(V8_MAJOR_VERSION) "." S(V8_MINOR_VERSION) "." S(V8_BUILD_NUMBER) "." S( \
+      V8_PATCH_LEVEL) CANDIDATE_STRING
+#else
+#define VERSION_STRING                                               \
+  S(V8_MAJOR_VERSION) "." S(V8_MINOR_VERSION) "." S(V8_BUILD_NUMBER) \
+      CANDIDATE_STRING
+#endif
+
 namespace v8 {
 namespace internal {
 
@@ -21,7 +40,7 @@
 int Version::patch_ = V8_PATCH_LEVEL;
 bool Version::candidate_ = (V8_IS_CANDIDATE_VERSION != 0);
 const char* Version::soname_ = SONAME;
-const char* Version::version_string_ = V8_VERSION_STRING;
+const char* Version::version_string_ = VERSION_STRING;
 
 // Calculate the V8 version string.
 void Version::GetString(Vector<char> str) {