appveyor: msbuild: set verbosity to minimal

... to reduce the Appveyor build time.

Author: ldorau

appveyor.yml

@@ -28,16 +28,17 @@ before_build:
 
 build_script:
 - msbuild build/ALL_BUILD.vcxproj /property:Configuration=%CONFIGURATION%
+          /verbosity:minimal
 
 test_script:
 - cd build
 - ctest -C %CONFIGURATION% --output-on-failure
-- msbuild INSTALL.vcxproj
+- msbuild INSTALL.vcxproj /verbosity:minimal
 - cd ..
 # build standalone example
 - cd examples/map_cli
 - cmake . -G "%GENERATOR%"
         -DCMAKE_TOOLCHAIN_FILE=c:/tools/vcpkg/scripts/buildsystems/vcpkg.cmake
         -DCMAKE_PREFIX_PATH=c:/install/libpmemobj-cpp
         -DTESTS_USE_FORCED_PMEM=ON
-- msbuild ALL_BUILD.vcxproj
+- msbuild ALL_BUILD.vcxproj /verbosity:minimal