app: fix build with extra include paths
app: fix build with extra include paths

The "includes" variable in the app/meson.build file was ignored when
building the executable, meaning that apps couldn't pass additional
include paths directly back. Fix this to align with drivers and libs.

Fixes: fa036e70d794 ("app: generalize meson build")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <66b9e8e8fbd5e9f41f91b0af050876182ce9d0e4@intel.com>
Reviewed-by: David Marchand <f28529695cfa9e3e1eb84e7072aa626af4abb18e@redhat.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk