Use 'uname -m' instead of arch
Use 'uname -m' instead of arch

'uname -m' seems to be more general to get the machine's architecture
type.  Ubunbu 8.10 (and also all debian based distros?) does not have
arch(1).

Signed-off-by: Ryousei Takano <daf52c9a223ff54c9b7387ca330899e97a009410@aist.go.jp>
Signed-off-by: Daniel Lezcano <3211518dd4d87cb3f7ee12cb52e14b7fb2bc0446@fr.ibm.com>

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