Convert net/axa to USES=autoreconf

[truckman]

Summary

Convert to USES=autoreconf

Use option helpers.

Test Plan

Build on FreeBSD 8, 9, and 10, and both amd64 and i386.

Test with DOXYGEN option both on and off.

[truckman]

Use option helpers.

[mat]

net/axa/Makefile

24

That one should go when you add USES=autoreconf

37

Add a space before this line.

[truckman]

Delete leftover AUTOMAKE_ARGS from before the conversion to autoreconf.

Add a missing blank line between a variable assignment and a .include.

[truckman]

Closed by commit rP376720 (authored by @truckman).