Revert "try to run travis without sudo to run in container"

This reverts commit r51705, r51706.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51708 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

.travis.yml

@@ -16,10 +16,6 @@
 #
 # is also a good place to look at.
 
-# new infrastructure
-# http://docs.travis-ci.com/user/migrating-from-legacy/
-sudo: false
-
 # Language specification.
 language: c
 
@@ -39,16 +35,16 @@ os:
 # far since the 1.9.1 release.
 before_install:
   - "CONFIG_FLAG="
-  #- "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq update; fi"
+  - "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq update; fi"
   # Travis ships an outdated, broken version of libssl by default
-  #- "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq --only-upgrade install '^libssl.*'; fi"
-  #- "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq install $CC; fi" # upgrade if any
+  - "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq --only-upgrade install '^libssl.*'; fi"
+  - "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq install $CC; fi" # upgrade if any
   - "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then JOBS='-j'; fi"
   - "if [[ $TRAVIS_OS_NAME = 'osx' ]]; then brew install autoconf gdbm openssl; fi"
   - "if [[ $TRAVIS_OS_NAME = 'osx' ]]; then CONFIG_FLAG=\"$CONFIG_FLAG --with-gdbm-dir=`brew --prefix gdbm`\"; fi"
   - "if [[ $TRAVIS_OS_NAME = 'osx' ]]; then CONFIG_FLAG=\"$CONFIG_FLAG --with-openssl-dir=`brew --prefix openssl`\"; fi"
   - "if [[ $TRAVIS_OS_NAME = 'osx' && $CC = 'gcc' ]]; then CC='gcc-4.9'; fi"
-#install: "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq build-dep ruby1.9.1 2>/dev/null; fi"
+install: "if [[ $TRAVIS_OS_NAME = 'linux' ]]; then sudo apt-get -qq build-dep ruby1.9.1 2>/dev/null; fi"
 
 # Script is where the test runs.  Note  we just do "make test", not other tests
 # like  test-all, test-rubyspec.   This is  because  they take  too much  time,