kbuild: move include/config/ksym/* to include/ksym/*

The idea of using fixdep was inspired by Kconfig, but autoksyms
belongs to a different group.  So, I want to move those touched
files under include/config/ksym/ to include/ksym/.

The directory include/ksym/ can be removed by 'make clean' because
it is meaningless for the external module building.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
diff --git a/.gitignore b/.gitignore
index 1be78fd..85bcc26 100644
--- a/.gitignore
+++ b/.gitignore
@@ -87,6 +87,7 @@
 #
 include/config
 include/generated
+include/ksym
 arch/*/include/generated
 
 # stgit generated dirs