Bug 21709: Upgrade Go to 1.7.5.

tor-browser-bundle.git commit: 1942f7b2f6e5f82c64dcfeab82713604866cb26f

projects/go/config

 # vim: filetype=yaml sw=2
-version: 1.7.4
+version: 1.7.5
 filename: '[% project %]-[% c("version") %]-[% c("var/build_id") %].tar.gz'
 remote_docker: 1
 
@@ -75,7 +75,7 @@ input_files:
     enable: '[% c("var/windows") || c("var/osx") %]'
   - URL: 'https://golang.org/dl/go[% c("version") %].src.tar.gz'
     name: go
-    sha256sum: 4c189111e9ba651a2bb3ee868aa881fab36b2f2da3409e80885ca758a6b614cc
+    sha256sum: 4e834513a2079f8cbbd357502cccaac9507fd00a1efe672375798858ff291815
   - URL: 'https://golang.org/dl/go[% c("var/go14_version") %].src.tar.gz'
     name: go14
     sha256sum: 9947fc705b0b841b5938c48b22dc33e9647ec0752bae66e50278df4f23f64959