add clcache to Windows build

Author: kroening

buildspec-windows.yml

@@ -5,9 +5,7 @@ phases:
     commands:
       - choco install cyg-get -y --no-progress
       - cyg-get bash patch bison flex make wget perl
-      - nuget install clcache -OutputDirectory "c:\tools\cygwin\bin" -ExcludeVersion
-      - Move-Item -Path "c:\tools\cygwin\bin\clcache\clcache-4.1.0\clcache.exe" -Destination "c:\tools\cygwin\bin\clcache.exe"
-      - cmd /c 'dir c:\tools\cygwin\bin\clcache.exe'
+      - nuget install clcache -OutputDirectory "c:\tools" -ExcludeVersion
 
   build:
     commands:
@@ -16,12 +14,12 @@ phases:
         C:\tools\cygwin\bin\bash -c "make -C src minisat2-download DOWNLOADER=wget"
 
       - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
+        $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
         cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C src BUILD_ENV=MSVC" '
         cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C unit all BUILD_ENV=MSVC" '
 
       - |
-        $env:Path = "C:\tools\cygwin\bin;$env:Path"
+        $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
         cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make -j4 -C jbmc/src setup-submodules" && bash -c "make CXX=clcache.exe -j4 -C jbmc/src BUILD_ENV=MSVC" '
         cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C jbmc/unit all BUILD_ENV=MSVC" '