Move __C99FEATURES__ define to compile for Solaris

Patch from ry.
http://codereview.chromium.org/1990010/show

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4638 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

SConstruct

@@ -179,6 +179,9 @@ LIBRARY_FLAGS = {
       'CCFLAGS':      ['-ansi'],
     },
     'os:solaris': {
+      # On Solaris, to get isinf, INFINITY, fpclassify and other macros one
+      # needs to define __C99FEATURES__.
+      'CPPDEFINES': ['__C99FEATURES__'],
       'CPPPATH' : ['/usr/local/include'],
       'LIBPATH' : ['/usr/local/lib'],
       'CCFLAGS':      ['-ansi'],

src/platform.h

@@ -44,12 +44,6 @@
 #ifndef V8_PLATFORM_H_
 #define V8_PLATFORM_H_
 
-#ifdef __sun
-// On Solaris, to get isinf, INFINITY, fpclassify and other macros one needs
-// to define this symbol
-#define __C99FEATURES__ 1
-#endif
-
 #define V8_INFINITY INFINITY
 
 // Windows specific stuff.