travis: fix install of coverage tools in matrix tests

Author: julienschmidt

.travis.yml

@@ -23,6 +23,8 @@ matrix:
       services:
         - docker
       before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
         - docker pull mysql:5.7
         - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
           mysql:5.7 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB
@@ -43,6 +45,8 @@ matrix:
       services:
         - docker
       before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
         - docker pull mariadb:5.5
         - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
           mariadb:5.5 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB
@@ -63,6 +67,8 @@ matrix:
       services:
         - docker
       before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
         - docker pull mariadb:10.1
         - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
           mariadb:10.1 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB
@@ -83,4 +89,4 @@ script:
   - go test -v -covermode=count -coverprofile=coverage.out
   - go vet ./...
   - test -z "$(gofmt -d -s . | tee /dev/stderr)"
-  - $HOME/gopath/bin/goveralls  -coverprofile=coverage.out -service=travis-ci
+  - $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci