Merge pull request #812 from libgit2/cmn/update-libgit2

Bump libgit2 to 08cfa43d0e1a

Author: carlosmn

.travis.yml

@@ -38,6 +38,6 @@ git:
 before_install:
   - git submodule update --init
   - gem update --system
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then ./vendor/libgit2/ci/setup-osx.sh; fi
+  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then ./vendor/libgit2/azure-pipelines/setup-osx.sh; fi
 
 script: script/travisbuild

ext/rugged/extconf.rb

@@ -14,6 +14,7 @@
 $CFLAGS << " -Wall -Wno-comment"
 
 cmake_flags = [ ENV["CMAKE_FLAGS"] ]
+cmake_flags << "-DREGEX_BACKEND=builtin"
 cmake_flags << "-DUSE_SHA1DC=ON" if with_config("sha1dc")
 
 def sys(cmd)