CI:azure:windows_build_deps.cmd: Enforce MSVC libxml build

The issue:
While running this script locally, using the MSVC2022, cmake picked
some MinGW/MSYS toolchain which built fine but produced a libxml2.dll.a
instead of libxml2.dll.
Moreover, since this script takes the compiler, toolset and architecture
as parameters it makes sense to pass the to the libxml build as well.

Signed-off-by: Dan Nechita <dan.nechita@analog.com>

Author: dNechita

CI/azure/windows_build_deps.cmd

@@ -38,5 +38,5 @@ rm .\libxml2-2.9.14.tar.xz
 %msbuild% .\zstd\build\VS2010\zstd.sln /p:Platform=%ARCH% /p:Configuration=Release /p:PlatformToolset=%PLATFORM_TOOLSET%
 %msbuild% .\libserialport\libserialport.vcxproj /p:Platform=%ARCH% /p:Configuration=Release /p:PlatformToolset=%PLATFORM_TOOLSET%
 :: build libxml with cmake
-cmake -DCMAKE_INSTALL_PREFIX=libxml2-install -DLIBXML2_WITH_ICONV=OFF -DLIBXML2_WITH_LZMA=OFF -DLIBXML2_WITH_PYTHON=OFF -DLIBXML2_WITH_ZLIB=OFF -S .\libxml2-2.9.14\ -B libxml2-build
+cmake -G "%COMPILER%" -A %ARCH% -DCMAKE_INSTALL_PREFIX=libxml2-install -DLIBXML2_WITH_ICONV=OFF -DLIBXML2_WITH_LZMA=OFF -DLIBXML2_WITH_PYTHON=OFF -DLIBXML2_WITH_ZLIB=OFF -S .\libxml2-2.9.14\ -B libxml2-build
 cmake --build libxml2-build --config Release --target install