Bug 19119 [dogfood+] Mac build of PSM in-process. r = beard.

build/mac/BuildNGLayout.pl

@@ -53,6 +53,7 @@ $build{runtime}			= 0;
 $build{common}          = 0;
 $build{imglib}          = 0;
 $build{necko}           = 0;
+$build{security}        = 0;
 $build{browserutils}    = 0;
 $build{intl}            = 0;
 $build{nglayout}        = 0;
@@ -127,6 +128,7 @@ if ($build{most})
 #   $build{common}          = 1;
 #   $build{imglib}          = 1;
 #   $build{necko}           = 1;
+#   $build{security}        = 1;
 #   $build{browserutils}    = 1;
 #   $build{intl}            = 1;
 #   $build{nglayout}        = 1;