Merge branch 'hotfix/1.25.33' into stable
improved detection of gcc binary path when not yet installed
bump default rubygems version
osx binary for ruby 2.1.3
allow forcing movable/static installation of older rubies
add note that the binary can be forced if the same path will be used
do not even try to build old rubies on new OSX, closes #3099
1.25.34
Merge branch 'master' into hotfix/1.25.34
Merge branch 'hotfix/1.25.34'
Correct pkg-config to pkgconfig for EL 7

Prior to this commit, `rvm requirements` attempted to bring in
`pkg-config` for EL 7. However, this package doesn't exist; the
correct package name is `pkgconfig`.

This commit renames the package for Red Hat 7, and allows Rubies to be
compiled successfully.
Merge pull request #3101 from rji/el7-pkgconfig-fixup

Correct pkg-config to pkgconfig for EL 7
https binaries url for jruby, thanks @headius
Merge branch 'master' of github.com:wayneeseguin/rvm
add better notifications for using sudo to create certificates dir, closes #3103