config: improve help text and prompt for debugging related options

The help text for the choice of different stripping levels is removed,
since it is not displayed by menuconfig. Instead, only the per-option
help text is visible, so this text is improved.

[Peter: slightly reworked text]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

Config.in

@@ -206,8 +206,12 @@ config BR2_DEPRECATED
 config BR2_ENABLE_DEBUG
 	bool "build packages with debugging symbols"
 	help
-	  Build packages with debugging symbols
-	  enabled
+	  Build packages with debugging symbols enabled. All libraries
+	  and binaries in the 'staging' directory will have debugging
+	  symbols, which allows remote debugging even if libraries and
+	  binaries are stripped on the target. Whether libraries and
+	  binaries are stripped on the target is controlled by the
+	  BR2_STRIP_* options below.
 
 if BR2_ENABLE_DEBUG
 choice
@@ -240,32 +244,36 @@ endchoice
 endif
 
 choice
-	prompt "strip"
+	prompt "strip command for binaries on target"
 	default BR2_STRIP_strip
-	help
-	  Select whether to strip binaries and libraries for the target
-	  or not.
-	  strip   is the normal strip command
-	  sstrip  is a strip that discards more than the normal strip
-	  none    do not strip (only for debugging!)
 
 config BR2_STRIP_strip
 	bool "strip"
 	depends on !BR2_ELF2FLT
 	help
-	  strip   is the normal strip command
+	  Binaries and libraries in the target filesystem will be
+	  stripped using the normal 'strip' command. This allows to
+	  save space, mainly by removing debugging symbols. Debugging
+	  symbols on the target are needed for native debugging, but
+	  not when remote debugging is used.
 
 config BR2_STRIP_sstrip
 	bool "sstrip"
 	select BR2_PACKAGE_SSTRIP_HOST
 	depends on !BR2_ELF2FLT
 	help
-	  sstrip  is a strip that discards more than the normal strip
+	  Binaries and libraries in the target filesystem will be
+	  stripped using the 'sstrip' command, which strips a little
+	  bit more than the traditional 'strip' command. This allows to
+	  save space, mainly by removing debugging symbols. Debugging
+	  symbols on the target are needed for native debugging, but
+	  not when remote debugging is used.
 
 config BR2_STRIP_none
 	bool "none"
 	help
-	  none    do not strip (only for debugging!)
+	  Do not strip binaries and libraries in the target
+	  filesystem.
 endchoice
 
 choice