kbuild: [PATCH] document modules_install in "make help"

The patch below adds information about modules_install to "make help".

Makefile

@@ -783,25 +783,26 @@ rpm:	clean spec
 
 help:
 	@echo  'Cleaning targets:'
-	@echo  '  clean		- remove most generated files but keep the config'
-	@echo  '  mrproper	- remove all generated files + config + various backup files'
+	@echo  '  clean		  - remove most generated files but keep the config'
+	@echo  '  mrproper	  - remove all generated files + config + various backup files'
 	@echo  ''
 	@echo  'Configuration targets:'
-	@echo  '  oldconfig	- Update current config utilising a line-oriented program'
-	@echo  '  menuconfig	- Update current config utilising a menu based program'
-	@echo  '  xconfig	- Update current config utilising a X-based program'
-	@echo  '  defconfig	- New config with default answer to all options'
-	@echo  '  allmodconfig	- New config selecting modules when possible'
-	@echo  '  allyesconfig	- New config where all options are accepted with yes'
-	@echo  '  allnoconfig	- New minimal config'
+	@echo  '  oldconfig	  - Update current config utilising a line-oriented program'
+	@echo  '  menuconfig	  - Update current config utilising a menu based program'
+	@echo  '  xconfig	  - Update current config utilising a X-based program'
+	@echo  '  defconfig	  - New config with default answer to all options'
+	@echo  '  allmodconfig	  - New config selecting modules when possible'
+	@echo  '  allyesconfig	  - New config where all options are accepted with yes'
+	@echo  '  allnoconfig	  - New minimal config'
 	@echo  ''
 	@echo  'Other generic targets:'
-	@echo  '  all		- Build all targets marked with [*]'
-	@echo  '* vmlinux	- Build the bare kernel'
-	@echo  '* modules	- Build all modules'
-	@echo  '  dir/file.[ois]- Build specified target only'
-	@echo  '  rpm		- Build a kernel as an RPM package'
-	@echo  '  tags/TAGS	- Generate tags file for editors'
+	@echo  '  all		  - Build all targets marked with [*]'
+	@echo  '* vmlinux	  - Build the bare kernel'
+	@echo  '* modules	  - Build all modules'
+	@echo  '  modules_install - Install all modules'
+	@echo  '  dir/file.[ois]  - Build specified target only'
+	@echo  '  rpm		  - Build a kernel as an RPM package'
+	@echo  '  tags/TAGS	  - Generate tags file for editors'
 	@echo  ''
 	@echo  'Documentation targets:'
 	@$(MAKE) --no-print-directory -f Documentation/DocBook/Makefile dochelp