ports use BUILD_DEPENDS:= ${RUN_DEPENDS}. This patch fixes ports that are
currently broken. This is a temporary measure until we organically stop using
:= or someone(s) spend a lot of time changing all the ports over.
Explicit duplication > := > = and this just moves ports one step to the left
Approved by: portmgr
the lowest version of perl available in ports is 5.8.9 which embed version
1.89 of Math::BigInt which is the same as the one available in
math/p5-Math-BigInt, so remove the useless dependency.
Keeping math/p5-Math-BigInt as it evolves alone
Bump port revision
