Allowing `--function_input=@file.npy` in command line tools.
This will load 1+ ndarrays into buffer views.

Progress on #9453.
diff --git a/tools/iree-benchmark-module-main.cc b/tools/iree-benchmark-module-main.cc
index 8674f36..a20020b 100644
--- a/tools/iree-benchmark-module-main.cc
+++ b/tools/iree-benchmark-module-main.cc
@@ -124,6 +124,8 @@
     "  2x2xi32=[[1 2][3 4]]\n"
     "Raw binary files can be read to provide buffer contents:\n"
     "  2x2xi32=@some/file.bin\n"
+    "numpy npy files (from numpy.save) can be read to provide 1+ values:\n"
+    "  @some.npy\n"
     "Each occurrence of the flag indicates an input in the order they were\n"
     "specified on the command line.");