When specifying a wrong directory with RTE_SDK and RTE_TARGET
to build an application, the error message about missing config
file was wrong.
Fixes: 6b62a72a70d0 ("mk: install a standard cutomizable tree")
Reported-by: Steeven Lee <steeven@gmail.com>
Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
973735dd99