scripts/package/Makefile: Fix typo: an deb -> a deb

Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

scripts/package/Makefile

@@ -141,7 +141,7 @@ perf-%pkg: FORCE
 help: FORCE
 	@echo '  rpm-pkg             - Build both source and binary RPM kernel packages'
 	@echo '  binrpm-pkg          - Build only the binary kernel package'
-	@echo '  deb-pkg             - Build the kernel as an deb package'
+	@echo '  deb-pkg             - Build the kernel as a deb package'
 	@echo '  tar-pkg             - Build the kernel as an uncompressed tarball'
 	@echo '  targz-pkg           - Build the kernel as a gzip compressed tarball'
 	@echo '  tarbz2-pkg          - Build the kernel as a bzip2 compressed tarball'