Build/Test Tools: Correct svn:mergeinfo for the 4.7 branch.

[49532] also merged [44176], [45445], and [49267], but these were missed in the commit message.

See #48301, #47767.

git-svn-id: https://develop.svn.wordpress.org/branches/4.7@50241 602fd350-edb4-49c9-b593-d223f7449a82

Author: desrosj