gawk: add missing comment for toolchain option dependencies

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gawk/Config.in

@@ -10,6 +10,6 @@ config BR2_PACKAGE_GAWK
 
 	  http://www.gnu.org/software/gawk/
 
-comment "gawk needs a toolchain w/ wchar"
+comment "gawk needs a toolchain w/ wchar, dynamic library"
 	depends on BR2_USE_MMU
-	depends on !BR2_USE_WCHAR
+	depends on !BR2_USE_WCHAR || BR2_PREFER_STATIC_LIB