toolchain: reduce the list of locales to keep by default

Our current list of locales to keep by default is "C en_US de fr". It
doesn't make much sense to keep "de" and "fr" more than any other
language. So let's keep only the "C" and "en_US" locales by default,
and leave it to the user to specify other locales to keep if needed.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

toolchain/toolchain-common.in

@@ -51,7 +51,7 @@ config BR2_ENABLE_LOCALE_PURGE
 
 config BR2_ENABLE_LOCALE_WHITELIST
 	string "Locales to keep"
-	default "C en_US de fr"
+	default "C en_US"
 	depends on BR2_ENABLE_LOCALE_PURGE
 	help
 	  Whitespace seperated list of locales to allow on target.