Merge branch 'hotfix/1.23.10' into stable
adding jruby-1.7.6 release
Merge pull request #2309 from brandonblack/jruby-1.7.6

minor: adding jruby-1.7.6 release
fix md5 file name for jruby-1.7.6, update #2309
fix Linux MagLev architecture detection, fix MagLev/maglev#322
use autodetected CC as initially_selected_compiler on OSX, update #2307
move rvm_configure_env to rvm_configure_flags for REE, update #2307
extended handling of gcc installed with brew, update #2307
1.23.11
Merge branch 'master' into hotfix/1.23.11
Merge branch 'hotfix/1.23.11' into stable
Merge branch 'hotfix/1.23.11'
Revert "move rvm_configure_env to rvm_configure_flags for REE, update #2307"

This reverts commit 53f9cc36684001ec985b8b23158ceca57abb013a.
add rubygems md5s 2.0.13 and 2.1.10
1.23.12
Merge branch 'master' into hotfix/1.23.12
Merge branch 'hotfix/1.23.12' into stable
Merge branch 'hotfix/1.23.12'
improve gcc detection in osx_port, fix #2317
add patch for fedora no_ec2m ssl problem, fix #2320, update #2319