Not really necessary to build perl, but porting/customized.t will check
the sums. Doing this defeats the purpose of customized.dat, but it's not
like there's much choice.

Separated from other patches to avoid dependence on patch ordering.

--- a/t/porting/customized.dat
+++ b/t/porting/customized.dat
@@ -56,7 +56,7 @@
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/Mkbootstrap.pm 76819099ea23505b590d76818ec9d8c5ec69b9bb
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/MM.pm c49b0fc30a30dd8af0d74fed15fb8d95b7c850f4
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/MM_Any.pm 1e0b0023bdd29e6c4ab315c8be8cb3c09fdc134a
-ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/MM_Unix.pm 420379b10bf7ecbec169a8047ebe27cc69e629be
+ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/MM_Unix.pm 1c432d8399a4658a51464155f546b5f08b996870
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/t/basic.t 3cb8d7aca46f529dfe62f9c5ed57aee7940bd6ca
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/t/lib/MakeMaker/Test/NoXS.pm 371cdff1b2375017907cfbc9c8f4a31f5ad10582
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/t/Liblist.t 9a3baf8a2c2281037f803b909d26e77a1bb099af