Remove unicodeobject.c and family from the OVM build!

This was easy because Python already has a Py_USING_UNICODE #define.

And it worked!  The only issue is that come modules like posixpath have
unicode constants.  So I added a hack in marshal.c to urn unicode
constants into string constants.

All spec tests pass.

Python-2.7.13/Modules/main.c

@@ -175,6 +175,7 @@ static int RunModule(char *module, int set_argv0)
    runpy = PyImport_ImportModule("runpy");
    if (runpy == NULL) {
        fprintf(stderr, "Could not import runpy module\n");
        PyErr_Print();
        return -1;
    }
    runmodule = PyObject_GetAttrString(runpy, "_run_module_as_main");

Python-2.7.13/Python/marshal.c

@@ -805,6 +805,12 @@ r_object(RFILE *p)

    case TYPE_INTERNED:
    case TYPE_STRING:
#ifdef OVM_MAIN
    /* Treat unicode constants like string constants.  They are already
     * utf-8 encoded.  TODO: change the output of the OPy compiler
     * and turn this into an exception. */
    case TYPE_UNICODE:
#endif
        n = r_long(p);
        if (n < 0 || n > SIZE32_MAX) {
            PyErr_SetString(PyExc_ValueError, "bad marshal data (string size out of range)");

Python-2.7.13/pyconfig.h

@@ -912,21 +912,12 @@
/* Define to printf format modifier for Py_ssize_t */
#define PY_FORMAT_SIZE_T "z"

/* Define as the integral type used for Unicode representation. */
#define PY_UNICODE_TYPE unsigned short

/* Define if you want to build an interpreter with many run-time checks. */
/* #undef Py_DEBUG */

/* Defined if Python is built as a shared library. */
/* #undef Py_ENABLE_SHARED */

/* Define as the size of the unicode type. */
#define Py_UNICODE_SIZE 2

/* Define if you want to have a Unicode type. */
#define Py_USING_UNICODE 0

/* assume C89 semantics that RETSIGTYPE is always void */
#define RETSIGTYPE void

build/compile.sh

@@ -40,7 +40,6 @@ Python/getopt.c
Python/pystrcmp.c
Python/pystrtod.c
Python/dtoa.c
Python/formatter_unicode.c
Python/formatter_string.c
'

@@ -81,8 +80,6 @@ Objects/structseq.c
Objects/tupleobject.c
Objects/typeobject.c
Objects/weakrefobject.c
Objects/unicodeobject.c
Objects/unicodectype.c
'

# Non-standard lib stuff.