Rename tools to releasetools

This is in preparation of NetBSD's tools directory to build tools
for cross compilation.

Makefile

@@ -17,7 +17,7 @@ usage:
 	@echo "	make install       # Compile and install commands"
 	@echo "	make clean         # Remove all compiler results"
 	@echo "" 
-	@echo "Run 'make' in tools/ to create a new MINIX configuration." 
+	@echo "Run 'make' in releasetools/ to create a new MINIX configuration."
 	@echo "" 
 
 # world has to be able to make a new system, even if there
@@ -81,14 +81,14 @@ install: .PHONY .MAKE
 	${MAKEDIRTARGET} man install
 	${MAKEDIRTARGET} man makedb
 	${MAKEDIRTARGET} share install
-	${MAKEDIRTARGET} tools install
+	${MAKEDIRTARGET} releasetools install
 
 clean: mkfiles .PHONY .MAKE
 .for dir in $(CMDSDIRS)
 	${MAKEDIRTARGET} ${dir} clean
 .endfor
 	${MAKEDIRTARGET} sys clean
-	${MAKEDIRTARGET} tools clean
+	${MAKEDIRTARGET} releasetools clean
 	${MAKEDIRTARGET} lib clean
 	${MAKEDIRTARGET} test clean
 
@@ -100,7 +100,7 @@ cleandepend: mkfiles .PHONY .MAKE
 
 # Shorthands
 all: .PHONY .MAKE dep-all
-	${MAKEDIRTARGET} tools all
+	${MAKEDIRTARGET} releasetools all
 
 # Obsolete targets
 elf-libraries: .PHONY