Run 32-bit x86 tests on Linux instead of Windows

Author: oschulz

.appveyor.yml

@@ -7,7 +7,6 @@ environment:
   - julia_version: nightly
 
 platform:
-  - x86 # 32-bit
   - x64 # 64-bit
 
 ## uncomment the following lines to allow failures on nightly julia

.travis.yml

@@ -11,6 +11,10 @@ julia:
   - 1.3
   - nightly
 
+arch:
+  - amd64
+  - x86
+
 ## uncomment the following lines to allow failures on nightly julia
 ## (tests will run but not make your overall status red)
 #matrix:
@@ -28,10 +32,14 @@ after_success:
   - julia -e 'import Pkg; Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())'
 
 jobs:
+  exclude:
+    - os: osx
+      arch: x86
   include:
     - stage: "Documentation"
       julia: 1.0
       os: linux
+      arch: amd64
       script:
         - julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
         - julia --project=docs/ docs/make.jl