jenkins_testing: build on mingw

git-svn-id: svn://dev.exiv2.org/svn@3378 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
jenkins_development: mingw testing

git-svn-id: svn://dev.exiv2.org/svn@3379 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
jenkins_development : build on mingw

git-svn-id: svn://dev.exiv2.org/svn@3380 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
jenkins_development : build on mingw

git-svn-id: svn://dev.exiv2.org/svn@3381 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
jenkins_development: build on mingw

git-svn-id: svn://dev.exiv2.org/svn@3382 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
jenkins_development: rolling back jenkins_build.sh.  I'll continue this development off-line

git-svn-id: svn://dev.exiv2.org/svn@3383 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3