travis: update go1.3beta2 -> go1.5beta3

.travis.yml

@@ -14,9 +14,9 @@ env:
 
 # Versions of go that are explicitly supported by gonum.
 go:
- - 1.5beta2
  - 1.3.3
  - 1.4.2
+ - 1.5beta3
 
 # Required for coverage.
 before_install:

.travis/linux/OpenBLAS/install.sh

@@ -3,6 +3,7 @@ sudo apt-get install -qq gfortran
 pushd ~
 sudo git clone --depth=1 git://github.com/xianyi/OpenBLAS
 pushd OpenBLAS
+echo OpenBLAS $(git rev-parse HEAD)
 sudo make FC=gfortran &> /dev/null
 sudo make PREFIX=/usr install
 popd