Mike Gelfand authored Jan 13, 2017 and Brad King committed Jan 13, 2017

When using a Makefiles generator, `install/local/fast` and
`install/strip/fast` targets are not at all fast.  They depend on
`install/local` and `install/strip` targets respectively instead of
`preinstall/fast` and don't contain any commands instead of repeating
commands in `install/local` and `install/strip`. The issue was
introduced by simple typos in commits v2.6.0~2825 (Adding install/local
global target for Makefile generators, 2006-08-29) and v2.6.0~1743 (add
install/strip target for makefile generators, 2007-05-18).