ci: explicitly run in the build directory

Explicitly run from the build directory, not the source.  (I was
mistaken about the default working directory for VSTS agents.)

(cherry picked from commit 306875bc)

.vsts-ci.yml

@@ -89,12 +89,15 @@ jobs:
   steps:
   - bash: . '$(Build.SourcesDirectory)/ci/setup-osx.sh'
     displayName: Setup
+    workingDirectory: '$(Build.BinariesDirectory)'
   - bash: . '$(Build.SourcesDirectory)/ci/build.sh'
     displayName: Build
+    workingDirectory: '$(Build.BinariesDirectory)'
     env:
       PKG_CONFIG_PATH: /usr/local/opt/openssl/lib/pkgconfig
   - bash: . '$(Build.SourcesDirectory)/ci/test.sh'
     displayName: Test
+    workingDirectory: '$(Build.BinariesDirectory)'
     env:
       TMPDIR: $(Agent.TempDirectory)
       LEAK_CHECK: leaks
@@ -112,10 +115,12 @@ jobs:
   steps:
   - powershell: . '$(Build.SourcesDirectory)\ci\build.ps1'
     displayName: Build
+    workingDirectory: '$(Build.BinariesDirectory)'
     env:
       CMAKE_OPTIONS: -DMSVC_CRTDBG=ON -G"Visual Studio 12 2013 Win64"
   - powershell: . '$(Build.SourcesDirectory)\ci\test.ps1'
     displayName: Test
+    workingDirectory: '$(Build.BinariesDirectory)'
   - task: PublishTestResults@2
     displayName: Publish Test Results
     condition: succeededOrFailed()
@@ -130,10 +135,12 @@ jobs:
   steps:
   - powershell: . '$(Build.SourcesDirectory)\ci\build.ps1'
     displayName: Build
+    workingDirectory: '$(Build.BinariesDirectory)'
     env:
       CMAKE_OPTIONS: -DMSVC_CRTDBG=ON -G"Visual Studio 12 2013"
   - powershell: . '$(Build.SourcesDirectory)\ci\test.ps1'
     displayName: Test
+    workingDirectory: '$(Build.BinariesDirectory)'
   - task: PublishTestResults@2
     displayName: Publish Test Results
     condition: succeededOrFailed()
@@ -148,16 +155,19 @@ jobs:
   steps:
   - powershell: . '$(Build.SourcesDirectory)\ci\setup-mingw.ps1'
     displayName: Setup
+    workingDirectory: '$(Build.BinariesDirectory)'
     env:
       TEMP: $(Agent.TempDirectory)
       ARCH: amd64
   - powershell: . '$(Build.SourcesDirectory)\ci\build.ps1'
     displayName: Build
+    workingDirectory: '$(Build.BinariesDirectory)'
     env:
       CMAKE_OPTIONS: -G"MinGW Makefiles"
       PATH: $(Agent.TempDirectory)\mingw64\bin;C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\CMake\bin
   - powershell: . '$(Build.SourcesDirectory)\ci\test.ps1'
     displayName: Test
+    workingDirectory: '$(Build.BinariesDirectory)'
   - task: PublishTestResults@2
     displayName: Publish Test Results
     condition: succeededOrFailed()
@@ -172,16 +182,19 @@ jobs:
   steps:
   - powershell: . '$(Build.SourcesDirectory)\ci\setup-mingw.ps1'
     displayName: Setup
+    workingDirectory: '$(Build.BinariesDirectory)'
     env:
       TEMP: $(Agent.TempDirectory)
       ARCH: x86
   - powershell: . '$(Build.SourcesDirectory)\ci\build.ps1'
     displayName: Build
+    workingDirectory: '$(Build.BinariesDirectory)'
     env:
       CMAKE_OPTIONS: -G"MinGW Makefiles"
       PATH: $(Agent.TempDirectory)\mingw32\bin;C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\CMake\bin
   - powershell: . '$(Build.SourcesDirectory)\ci\test.ps1'
     displayName: Test
+    workingDirectory: '$(Build.BinariesDirectory)'
   - task: PublishTestResults@2
     displayName: Publish Test Results
     condition: succeededOrFailed()