Fix packages wanting to run autoconf

[jdemeyer]

Some Sage packages want to run autoconf/autoheader/automake during installation. This may fail, since auto$foo is not a prerequisite of Sage. Usually, the build still works but in some cases, this may cause the build to fail (this happens for example with ecm-6.3.p3 on the Skynet machine "iras"). This can usually be fixed by fixing timestamps and/or not patching configure.in, only configure itself.

Packages which need to be fixed:

• cddlib: ​http://boxen.math.washington.edu/home/jdemeyer/spkg/cddlib-094f.p11.spkg
• ecm: ​http://boxen.math.washington.edu/home/jdemeyer/spkg/ecm-6.3.p4.spkg
• gd: ​http://boxen.math.washington.edu/home/jdemeyer/spkg/gd-2.0.35.p7.spkg
• libm4rie: ​http://boxen.math.washington.edu/home/jdemeyer/spkg/libm4rie-20111004.p2.spkg
• maxima: upstream issue which can't easily be fixed, so we leave this alone
• mpfi: fixed by #12171
• pynac: ​http://boxen.math.washington.edu/home/jdemeyer/spkg/pynac-0.2.3.p1.spkg

For reviewing: please have a look below at the various diffs for the spkg's. In some cases, it looks like nothing actually changed. This is because I only changed a timestamp in the src directory.

Once this ticket is merged, the release management script should be changed to check for these issues (and whitelist maxima).

[vbraun]

Looks good to me!