More pre-2.3 build tweaks for the OS/2 EMX port:

- more clean up of the generated import library definiton (.DEF file)
  following checking of patch 770521, and tightening of the sed regexps.

- use -O3 even with gcc 2.8.1 - worth nearly 10% with 2.3; worth
  nothing with 2.2.x.

- clean up a couple of whitespace issues introduced by a cut'n'paste.
diff --git a/PC/os2emx/pyconfig.h b/PC/os2emx/pyconfig.h
index 206223f..33fbda2 100644
--- a/PC/os2emx/pyconfig.h
+++ b/PC/os2emx/pyconfig.h
@@ -31,12 +31,12 @@
  * imported from the Python core DLL aren't duplicated.
  */
 #ifdef Py_BUILD_CORE
-#  define PyAPI_FUNC(RTYPE)     RTYPE
+#  define PyAPI_FUNC(RTYPE)	RTYPE
 #else
-#  define PyAPI_FUNC(RTYPE)     extern RTYPE
+#  define PyAPI_FUNC(RTYPE)	extern RTYPE
 #endif
-#define PyAPI_DATA(RTYPE)       extern RTYPE
-#define PyMODINIT_FUNC  void
+#define PyAPI_DATA(RTYPE)	extern RTYPE
+#define PyMODINIT_FUNC	void
 
 /* Use OS/2 flavour of threads */
 #define WITH_THREAD	1