CMakePM: Fix building openssl 1.1.1w with conan

The openssl 1.1.1.w package had an issue compiling on Windows with
Visual C++.

The fix is a variation of the upstream change at
conan-io/cmake-conan#689

Fixes: QTCREATORBUG-33451
Change-Id: I1bd1b171f1a34f78bf70b8221a4b9b75636d3ae6

Author: cristianadam

src/share/3rdparty/package-manager/conan_provider.cmake

@@ -329,7 +329,9 @@ macro(append_compiler_executables_configuration)
                         "Please define CMAKE_CXX_COMPILER or enable the C++ language.")
     endif()
 
-    if(NOT "x${_conan_c_compiler}${_conan_cpp_compiler}" STREQUAL "x")
+    # QtCreator: see https://github.com/conan-io/cmake-conan/pull/689 for details
+    if(NOT "x${_conan_c_compiler}${_conan_cpp_compiler}" STREQUAL "x"
+       AND NOT CMAKE_C_COMPILER_ID STREQUAL "MSVC")
         string(APPEND PROFILE "tools.build:compiler_executables={${_conan_c_compiler}${_conan_cpp_compiler}}\n")
     endif()
     unset(_conan_c_compiler)