mpy-cross/main: Document emit=host option in help.

Signed-off-by: Damien George <damien@micropython.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/mpy-cross/main.c b/mpy-cross/main.c
index 5375f38ac..16f749ae4 100644
--- a/mpy-cross/main.c
+++ b/mpy-cross/main.c
@@ -130,7 +130,7 @@ static int usage(char **argv) {
         "Target specific options:\n"
         "-msmall-int-bits=number : set the maximum bits used to encode a small-int\n"
         "-march=<arch> : set architecture for native emitter;\n"
-        "                x86, x64, armv6, armv6m, armv7m, armv7em, armv7emsp, armv7emdp, xtensa, xtensawin, rv32imc, debug\n"
+        "                x86, x64, armv6, armv6m, armv7m, armv7em, armv7emsp, armv7emdp, xtensa, xtensawin, rv32imc, host, debug\n"
         "\n"
         "Implementation specific options:\n", argv[0]
         );