Move source to src directory

Rsconscript

@@ -25,7 +25,7 @@ uefi_env = env "uefi" do |env|
   env["CFLAGS"] += %w[-ffreestanding]
   env["LDFLAGS"] += %w[-nostdlib -Wl,-dll -shared -Wl,--subsystem,10 -e efi_main]
   env["LIBS"] += %w[gcc]
-  env["sources"] = glob("*.c")
+  env["sources"] = glob("src/**/*.c")
   env.Program("^/BOOTX64.EFI", "${sources}")
   env.Image("^/efi-loader.img", "^/BOOTX64.EFI")
 end