helper/types: remove type '_Bool'

Accordingly to OpenOCD coding style, both typedef and Camelcase
symbols are forbidden.
The type '_Bool' is not used in the code, having 'bool' as
preferred choice.

Remove the definition of '_Bool' from 'types.h'.

Change-Id: I8863f9836ccd9166e0c69fa5d75d6fef79ae7bfb
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/6186
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

src/helper/types.h

@@ -47,16 +47,10 @@
 #ifndef __cplusplus
 
 #define false	0
-#define true		1
+#define true	1
 
-typedef int _Bool;
-#else
-typedef bool _Bool;
 #endif	/* __cplusplus */
 #endif	/* HAVE__BOOL */
-
-#define bool _Bool
-
 #endif	/* HAVE_STDBOOL_H */
 
 /// turns a macro argument into a string constant