Attempt to fix the Windows build.

It appears that there's a link.exe from GNU coreutils on the path before
the one from Visual Studio.

azure-pipelines.yml

@@ -50,10 +50,13 @@ jobs:
 
 
     - script: |
+        echo Deleting stupid link.exe from the path...
+        del c:\Program Files\Git\usr\bin\link.exe
+        echo Checking that we're calling the correct link.exe
+        where link.exe
         echo Creating build directory...
         mkdir build
         cd build
-        echo Importing visual studio environment variables...
         echo Running cmake...
         cmake .. -G Ninja -DTESTS=ON -DCMAKE_C_COMPILER="c:/Program Files/LLVM/bin/clang-cl.exe" -DCMAKE_CXX_COMPILER="c:/Program Files/LLVM/bin/clang-cl.exe"
         echo CMake completed.
@@ -64,7 +67,6 @@ jobs:
     - script: |
         cd build
         dir
-        echo Importing visual studio environment variables...
         set CCC_OVERRIDE_OPTIONS=x-TC x-TP x/TC x/TP
         echo Running ninja...
         ninja