Revert "remove SK_SUPPORT_LEGACY_BUILDMIPMAP"

This reverts commit 9acd04797101990af23f5c374b7dfcbaac12fd2b.

git-svn-id: http://skia.googlecode.com/svn/trunk@14685 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed