package/zerofree: fix double space in Config.in comment

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 05d3fdfd1314cce610f4fd2a55599b0595fcf2fc)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/zerofree/Config.in

@@ -9,6 +9,6 @@ config BR2_PACKAGE_ZEROFREE
 
 	  https://frippery.org/uml/
 
-comment "zerofree needs  a toolchain w/ dynamic library"
+comment "zerofree needs a toolchain w/ dynamic library"
 	depends on BR2_USE_MMU
 	depends on BR2_STATIC_LIBS