tinyalsa: fix toolchain comment

Documented syntax is '.. needs A toolchain ..'

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/tinyalsa/Config.in

@@ -13,5 +13,5 @@ config BR2_PACKAGE_TINYALSA
 
 	  https://github.com/tinyalsa/tinyalsa
 
-comment "tinyalsa needs toolchain w/ dynamic library"
+comment "tinyalsa needs a toolchain w/ dynamic library"
 	depends on BR2_STATIC_LIBS