build: fix codesigning arm64 release binaries

CMAKE_CROSSCOMPILING is true when building arm64 on an x64 host, so
ignore this on MSVC.

Eventually we want to run osslsigncode through wine when cross compiling
for win32 on other platforms, or use the native signtool.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

src/wx/CMakeLists.txt

@@ -1142,7 +1142,7 @@ if(NOT TRANSLATIONS_ONLY)
     if(UPSTREAM_RELEASE AND WIN32)
         set(home "$ENV{HOME}")
 
-        if(NOT CMAKE_CROSSCOMPILING AND NOT DEFINED ENV{MSYSTEM_PREFIX})
+        if((MSVC OR NOT CMAKE_CROSSCOMPILING) AND NOT DEFINED ENV{MSYSTEM_PREFIX})
             set(home "$ENV{USERPROFILE}")
         endif()