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
@@ -52,7 +52,7 @@
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/MakeMaker.pm 69351c5e5418046f9800b0d78cf454f5c1931e2d
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/Mkbootstrap.pm d79b98465a632dc3bde76a0210d01014d2257dc6
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/MM_Any.pm 3857ce6550b897d8bbc626e11b63c2266d624e07
-ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/MM_Unix.pm 01638a386424cafbed6a53b0c9b780c4d8637a92
+ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/lib/ExtUtils/MM_Unix.pm 329a8acefabf1d4e13b2794282aa930c5260a85e
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/t/basic.t 7d00e360e0e59099e5f9ff407f5f42f3f1816791
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/t/lib/MakeMaker/Test/NoXS.pm 371cdff1b2375017907cfbc9c8f4a31f5ad10582
 ExtUtils::MakeMaker dist/ExtUtils-MakeMaker/t/Liblist.t 9a3baf8a2c2281037f803b909d26e77a1bb099af