Fix tests

Author: Vinh Tran

cargo/private/cargo_build_script.bzl

@@ -445,7 +445,7 @@ def _cargo_dep_env_implementation(ctx):
         build_infos.append(BuildInfo(
             dep_env = empty_file,
             flags = empty_file,
-            link_flags = empty_file,
+            linker_flags = empty_file,
             link_search_paths = empty_file,
             out_dir = out_dir,
             rustc_env = empty_file,
@@ -464,7 +464,7 @@ def _cargo_dep_env_implementation(ctx):
         BuildInfo(
             dep_env = empty_file,
             flags = empty_file,
-            link_flags = empty_file,
+            linker_flags = empty_file,
             link_search_paths = empty_file,
             out_dir = None,
             rustc_env = empty_file,

rust/private/providers.bzl

@@ -75,7 +75,7 @@ BuildInfo = provider(
         "compile_data": "Depset[File]: Compile data provided by the build script that was not copied into `out_dir`.",
         "dep_env": "Optinal[File]: extra build script environment varibles to be set to direct dependencies.",
         "flags": "Optional[File]: file containing additional flags to pass to rustc",
-        "linker_flags": "Optional[File]: file containing flags to pass to the linker",
+        "linker_flags": "Optional[File]: file containing flags to pass to the linker invoked by rustc or cc_common.link",
         "link_search_paths": "Optional[File]: file containing search paths to pass to rustc and linker",
         "out_dir": "Optional[File]: directory containing the result of a build script",
         "rustc_env": "Optional[File]: file containing additional environment variables to set for rustc.",

rust/private/rustc.bzl

@@ -1668,6 +1668,9 @@ def _create_extra_input_args(build_info, dep_info):
         build_env_file = build_info.rustc_env
         if build_info.flags:
             build_flags_files.append(build_info.flags)
+        if build_info.linker_flags:
+            build_flags_files.append(build_info.linker_flags)
+            input_files.append(build_info.linker_flags)
 
         input_depsets.append(build_info.compile_data)