kconfig: document use of CONFIG_ environment variable
authorYann E. MORIN <yann.morin.1998@free.fr>
Wed, 19 Dec 2012 18:17:00 +0000 (19:17 +0100)
committerYann E. MORIN <yann.morin.1998@free.fr>
Tue, 25 Dec 2012 22:40:07 +0000 (23:40 +0100)
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

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