Update git-archive-all to 1.15

[Kentzo]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same formula update/change?
• Have you built your formula locally prior to submission with brew install <formula> (where <formula> is the name of the formula you're submitting)?
• Does your submission pass brew audit --new-formula <formula> (after doing brew install <formula>)?

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[Kentzo]

How do I update bottle?

[MikeMcQuaid]

@Kentzo We'll do that when pulling. The test is failing so needs adjusted: https://bot.brew.sh/job/Homebrew%20Core%20Pull%20Requests/7074/version=el_capitan/testReport/junit/brew-test-bot/el_capitan/test_git_archive_all/

[ilovezfs]

@Kentzo the test can be fixed with this diff

diff --git a/Formula/git-archive-all.rb b/Formula/git-archive-all.rb
index 6b0ce32..c15dcf9 100644
--- a/Formula/git-archive-all.rb
+++ b/Formula/git-archive-all.rb
@@ -27,7 +27,7 @@ class GitArchiveAll < Formula
     system "git", "add", "homebrew"
     system "git", "commit", "--message", "brewing"

-    assert_equal "#{testpath}/homebrew => archive/homebrew",
+    assert_equal "#{testpath.realpath}/homebrew => archive/homebrew",
                  shell_output("#{bin}/git-archive-all --dry-run ./archive", 0).chomp
   end
 end

[Kentzo]

@ilovezfs Was fixed by checks still fail.

[Kentzo]

Anyone?

[dunn]

@BrewTestBot test this please

[dunn]

Sorry for the delay! Merged as 488f523.