Fix travis config and make untaring less verbosing.

.travis.yml

@@ -1,5 +1,11 @@
 language: c
 script: asdf plugin-test php https://github.com/odarriba/asdf-php.git
+before_install:
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install freetype bison27 gettext icu4c jpeg libpng openssl readline homebrew/dupes/zlib curl; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew link --force bison27; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get update -qq; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install curl build-essential autoconf libjpeg-dev libpng12-dev openssl libssl-dev libcurl4-openssl-dev pkg-config libsslcommon2-dev libreadline-dev libedit-dev zlib1g-dev libicu-dev libxml2-dev gettext bison libmysqlclient-dev libpq-dev -y; fi
 before_script:
   - git clone https://github.com/asdf-vm/asdf.git
   - . asdf/asdf.sh

bin/install

@@ -22,7 +22,7 @@ install_php() {
     # working directory.
     (
         cd $(dirname $source_path)
-        tar -zxvf $source_path || exit 1
+        tar -zxf $source_path || exit 1
 
         cd $(untar_path $install_type $version $tmp_download_dir)