kbuild: version.h and new headers_* targets does not require a kernel config

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Makefile

@@ -368,6 +368,7 @@ endif
 
 no-dot-config-targets := clean mrproper distclean \
 			 cscope TAGS tags help %docs check% \
+			 include/linux/version.h headers_% \
 			 kernelrelease kernelversion
 
 config-targets := 0