toolchain: Clean up locale support menu

Closes #421.

This patch cleans up and fixes some minor issues with the locale support
section of the toolchain menu.

1. uClibc requires wchar support if locales are enabled, make locale
   support select wchar support.

2.  Allow purging of locale information even if there is no locale
    support in the C library.  This cleans up after packages that
    install things into /usr/share/locale on the target.

Signed-off-by: Will Newton <will.newton@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

CHANGES

@@ -27,6 +27,7 @@
 	#411: ipsec-tools: Bump version to 0.7.2
 	#417: New package spawn-fcgi
 	#419: Bump lighttpd package to 1.4.23
+	#421: toolchain: Clean up toolchain locale support menu
 	#467: DirectFB 1.4.1
 	#473: memstat_0.5.tar.gz has install with -D and that fails "make"
 

toolchain/Config.in.2

@@ -27,12 +27,13 @@ config BR2_INET_RPC
 	  built with RPC support then enable this option.
 
 config BR2_ENABLE_LOCALE
-	bool "Enable locale/gettext/i18n support?"
+	bool "Enable toolchain locale/i18n support?"
+	select BR2_USE_WCHAR
 	help
 	  If you are building your own toolchain and you want to 
-	  enable locale/gettext/i18n support then enable this option.
+	  enable locale/i18n support then enable this option.
 	  If you have an external binary toolchain that has been 
-	  built with locale/gettext/i18n support then enable this option.
+	  built with locale/i18n support then enable this option.
 
 config BR2_ENABLE_LOCALE_PREGENERATED
 	bool "Use pregenerated locale data?"
@@ -46,7 +47,6 @@ config BR2_ENABLE_LOCALE_PREGENERATED
 
 config BR2_ENABLE_LOCALE_PURGE
 	bool "Purge unwanted locales"
-	depends on BR2_ENABLE_LOCALE
 	help
 	  Explicitly specify what locales to install on target. If N
 	  then all locales supported by packages are installed.