Makefile: Move some scripts imported from Linux

We have some scripts imported from Linux Kernel:
setlocalversion, checkstack.pl, checkpatch.pl, cleanpatch

They are located under tools/ directory in U-Boot now.
But they were originally located under scripts/ directory
in Linux Kernel.

This commit moves them to the original location.

It is true that binutils-version.sh and dtc-version.sh
do not originate in Linux Kernel, but they should
be moved by analogy to gcc-version.sh.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/config.mk b/config.mk
index d5b09a0..b824bb3 100644
--- a/config.mk
+++ b/config.mk
@@ -125,9 +125,9 @@
 
 # cc-version
 # Usage gcc-ver := $(call cc-version)
-cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
-binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS))
-dtc-version = $(shell $(SHELL) $(SRCTREE)/tools/dtc-version.sh $(DTC))
+cc-version = $(shell $(SHELL) $(SRCTREE)/scripts/gcc-version.sh $(CC))
+binutils-version = $(shell $(SHELL) $(SRCTREE)/scripts/binutils-version.sh $(AS))
+dtc-version = $(shell $(SHELL) $(SRCTREE)/scripts/dtc-version.sh $(DTC))
 
 #
 # Include the make variables (CC, etc...)