Black-list 'tar_rom.run' on Linux

os/run/tar_rom.run

@@ -11,6 +11,13 @@
 # line of LOG output.
 #
 
+#
+# On Linux, programs can be executed only if present as a file on the Linux
+# file system ('execve' takes a file name as argument). Data extracted via
+# 'tar_rom' is not represented as file. Hence, it cannot be executed.
+#
+if {[have_spec linux]} { puts "Run script does not support Linux"; exit 0 }
+
 build "core init drivers/timer test/timer server/tar_rom"
 
 create_boot_directory