Avoid $(location) in syscall tests.

Instead just find the syscall_test_runner binary in the shell script.

PiperOrigin-RevId: 228621230
Change-Id: I274ee0874e47d53f59474b1ac730ee45e3dff977

test/syscalls/build_defs.bzl

@@ -34,9 +34,7 @@ def _syscall_test(test, shard_count, size, platform):
             test,
         ],
         args = [
-            # First argument is location to syscall_test_runner go binary.
-            "$(location :syscall_test_runner)",
-            # Rest of arguments are passed directly to syscall_test_runner binary.
+            # Arguments are passed directly to syscall_test_runner binary.
             "--test-name=" + test_name,
             "--platform=" + platform,
             "--debug=false",

test/syscalls/syscall_test_runner.sh

@@ -20,6 +20,8 @@
 
 set -euf -o pipefail
 
-# The syscall test runner binary and arguments have all been passed as arguments
-# to this shell script.
-exec "$@"
+# Get location of syscall_test_runner binary.
+readonly runner=$(find ${TEST_SRCDIR} -name syscall_test_runner)
+
+# Pass the arguments of this script directly to the runner.
+exec "${runner}" "$@"