[tst:multibuild] run library_builders in manylinux (#65)

* [tst:multibuild] run library_builders in manylinux

* [tst:multibuild] fix

* [tst:multibuild] source linux steps

* [travis] require sudo on linux

* [tst:multlibuild] touch config

* [travis] drop sudo for precise

* [tst:multibuld] cleanup

* [tst:multibuild] check for docker

* [tst:multibuild] fix docker check

* [tst:multibuild] drop docker

* [tst:multibuild] fix command

.travis.yml

@@ -17,11 +17,13 @@ matrix:
       dist: trusty
       env:
         - TEST_BUILDS=1
+      sudo: required
     - os: linux
       dist: trusty
       env:
         - TEST_BUILDS=1
         - USE_CCACHE=1
+      sudo: required
     - os: osx
       osx_image: xcode6.4
       env:

tests/test_multibuild.sh

@@ -16,7 +16,13 @@ else
     source tests/test_manylinux_utils.sh
 fi
 if [ -n "$TEST_BUILDS" ]; then
-    source tests/test_library_builders.sh
+    if [ -n "$IS_OSX" ] || [ ! -x "$(command -v docker)" ]; then
+        source tests/test_library_builders.sh        
+    else
+        touch config.sh
+        source travis_linux_steps.sh
+        build_multilinux i686 "source tests/test_library_builders.sh"
+    fi
 fi
 
 # Exit 1 if any test errors