tools build: Use .s extension for preprocessed assembler code

The "man gcc" says .i extension represents the file is C source code
that should not be preprocessed.  Here, .s should be used.

For clarification,
  .c  ---(preprocess)--->  .i
  .S  ---(preprocess)--->  .s

Signed-off-by: Masahiro Yamada <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Aaro Koskinen <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Lukas Wunner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions