makefile: fix the root path of OPENOCD_SCRIPT_ROOT

fix issue #174

Signed-off-by: Jingru Wang <[email protected]>

Author: wangnuannuan

options/toolchain/toolchain_gnu.mk

@@ -156,7 +156,7 @@ ifeq ($(findstring $(MAKECMDGOALS),run gui),)
 endif
 endif
 else
-    OPENOCD_SCRIPT_ROOT = $(OPENOCD_EXECUTABLE_ROOT)/share/openocd/scripts
+    OPENOCD_SCRIPT_ROOT = $(OPENOCD_EXECUTABLE_ROOT)/../share/openocd/scripts
 endif
 
 ## Don't change this line