merge of reated changes kernel build: add Android makefile

	So that this kernel can be compiled together with the rest of Android
	(i.e. build automatically creates boot.bin)

	Change-Id: I7f59d0d17ed267e101f0cee2f75a5893de5cfbcb

	kbuild: add a make defoldconfig make option

	The oldconfig option is asking user to choose when new config options are defined in KConfig files, and not in .config
	This prevents automatic builds.

	This make target will use default values for all options not specified in .config

	xxChange - Id: I713a5cc248130056441060dccfcb492ad0d8acb5
	Signed-off-by: Pierre Tardy <[email protected]>

Reviewed-by: Jeffrey Carlyle <[email protected]>
(cherry picked from commit 4822057684046234dee05de0619701adf72f2923)
(cherry picked from commit 63bbc7b21c9ec6252fd475ac30c433871be71992)

scripts/kconfig/Makefile

@@ -32,6 +32,9 @@ nconfig: $(obj)/nconf
 oldconfig: $(obj)/conf
 	$< --$@ $(Kconfig)
 
+defoldconfig: $(obj)/conf
+	$< --defconfig=.config $(Kconfig)
+
 silentoldconfig: $(obj)/conf
 	$(Q)mkdir -p include/generated
 	$< --$@ $(Kconfig)