Fix const cast error for MSVC2015 build.

The Visual Studio 2015 build was failing with the following error:
error C2440: 'initializing': cannot convert from 'const char [12]' to 'char *'

This should fix the problem by initializing a non const char array, instead of taking a pointer to const static data.

llvm-svn: 259042

lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp

@@ -146,7 +146,7 @@ private:
         size_t size = 0;
         static wchar_t *g_python_home = Py_DecodeLocale(LLDB_PYTHON_HOME, &size);
 #else
-        static char *g_python_home = LLDB_PYTHON_HOME;
+        static char g_python_home[] = LLDB_PYTHON_HOME;
 #endif
         Py_SetPythonHome(g_python_home);
 #endif