make: Automake is complaining about .PRECIOUS being redefined

make: Automake is complaining about .PRECIOUS being redefined

Yesterday I added test-suite.log as dependency to the .PRECIOUS
target. Automake is warning about this target being redefined
and from what I see there is no way I can stop the warning but
I can add the %MAKEFILE% as dependency.

automake warning:
Makefile.am:35: warning: user target '.PRECIOUS' defined here ...
/usr/share/automake-1.13/am/configure.am: ... overrides Automake target '.PRECIOUS' defined here

[zj: s/%MAKEFILE%/Makefile/ because %MAKEFILE% wasn't actually substituted properly.]