[bazel] Resolve incompatible_disallow_empty_glob errors

Future versions of Bazel will enable the
`--incompatible_disallow_empty_glob` flag by default. Globs which return
zero results must have the `allow_empty = True` parameter.

The file export in `hw/top_earlgrey/data` for `autogen/` was invalid:
`autogen` is now a package itself and the parent cannot export files
from it.

Signed-off-by: James Wainwright <[email protected]>

Author: jwnrt

hw/top_earlgrey/data/BUILD

@@ -4,8 +4,6 @@
 
 package(default_visibility = ["//visibility:public"])
 
-exports_files(glob(["autogen/**"]))
-
 filegroup(
     name = "all_files",
     srcs = glob(["**"]),

signing/examples/signatures/BUILD

@@ -6,10 +6,16 @@ package(default_visibility = ["//visibility:public"])
 
 filegroup(
     name = "ecdsa_signatures",
-    srcs = glob(["*.ecdsa_sig"]),
+    srcs = glob(
+        ["*.ecdsa_sig"],
+        allow_empty = True,
+    ),
 )
 
 filegroup(
     name = "spx_signatures",
-    srcs = glob(["*.spx_sig"]),
+    srcs = glob(
+        ["*.spx_sig"],
+        allow_empty = True,
+    ),
 )

sw/device/silicon_creator/rom_ext/sival/signatures/BUILD

@@ -6,10 +6,16 @@ package(default_visibility = ["//visibility:public"])
 
 filegroup(
     name = "ecdsa_signatures",
-    srcs = glob(["*.ecdsa_sig"]),
+    srcs = glob(
+        ["*.ecdsa_sig"],
+        allow_empty = True,
+    ),
 )
 
 filegroup(
     name = "spx_signatures",
-    srcs = glob(["*.spx_sig"]),
+    srcs = glob(
+        ["*.spx_sig"],
+        allow_empty = True,
+    ),
 )