Update CHANGELOG.md

Author: fatih

CHANGELOG.md

@@ -6,6 +6,7 @@ IMPROVEMENTS:
 
 * Function calls are now highligted as wel when `g:go_highlight_functions` is enabled [gh-1048]
 * Add completion support for uninported packages. This allows to complete even if the package is not improted [gh-1084]
+* Tools that embeds GOROOT into their binaries do not work when people update their Go version and the GOROOT contains the vesion as part of their path (i.e: `/usr/local/Cellar/go/1.7.2/libexec`, [more info](https://blog.filippo.io/stale-goroot-and-gorebuild/)) . This is now fixed by introducing automatic GOROOT set/unset before each tool invoke. [gh-954]
 
 BUG FIXES: