package/musl: add an upstream URL to Config.in

Add an upstream URL to the help text in Config.in. This
addresses the 'Missing' URL status in the package stats
web page output.

[Peter: also add URL to BR2_TOOLCHAIN_BUILDROOT_MUSL help]
Signed-off-by: Mark Corbin <mark@dibsco.co.uk>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/musl/Config.in

@@ -8,3 +8,5 @@ config BR2_PACKAGE_MUSL
 		&& !(BR2_i386 || BR2_powerpc)
 	# Compatibility headers: cdefs.h, queue.h
 	select BR2_PACKAGE_MUSL_COMPAT_HEADERS
+	help
+	  https://www.musl-libc.org/

toolchain/toolchain-buildroot/Config.in

@@ -94,6 +94,8 @@ config BR2_TOOLCHAIN_BUILDROOT_MUSL
 	  This option selects musl as the C library for the
 	  cross-compilation toolchain.
 
+	  https://www.musl-libc.org/
+
 endchoice
 
 config BR2_TOOLCHAIN_BUILDROOT_LIBC