Add new variable TARGET_SHELL := ash (default; or mksh)
Besides that, add enough magic to build everything tagged
as "shell_$(TARGET_SHELL)" and permit ash/mksh as not unusual
Change-Id: I36c0590ba49f45251d24dc179cb27c8368c3662a
diff --git a/core/config.mk b/core/config.mk
index 337152c..0a306e1 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -105,6 +105,9 @@
# Default is to prelink modules.
TARGET_PRELINK_MODULE := true
+# Default shell is ash. Other possible value is mksh.
+TARGET_SHELL := ash
+
# ###############################################################
# Include sub-configuration files
# ###############################################################