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diff -up mozilla-aurora/tools/power/moz.build.rapl mozilla-aurora/tools/power/moz.build
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--- mozilla-aurora/tools/power/moz.build.rapl	2016-01-18 10:55:59.461937398 +0100
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+++ mozilla-aurora/tools/power/moz.build	2016-01-18 10:56:04.483935330 +0100
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@@ -11,7 +11,7 @@ if CONFIG['OS_ARCH'] == 'Darwin' and CON
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 if CONFIG['OS_ARCH'] == 'Linux' and CONFIG['OS_TARGET'] != 'Android' and \
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    CONFIG['CPU_ARCH'] in ('x86', 'x86_64'):
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-    do_rapl = True
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+    do_rapl = False
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 if do_rapl:
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     SimplePrograms([