crashreport: __cpuid/__cpuidex are not available on arm64

…and from a quick glance similar features are not exposed to userland
applications on arm64:

https://docs.kernel.org/arm64/cpu-feature-registers.html
"The ARM architecture defines a set of feature registers, which describe
the capabilities of the CPU/system. Access to these system registers is
restricted from EL0 and there is no reliable way for an application to
extract this information to make better decisions at runtime.[…]"

Thus the CPU information would have to be gathered from the OS, probably
from the Windows registry, at least it should be possible to read the
name/model that way…

Change-Id: I39e3679a7c4c581d8e3e4f71842d7ea7cdc2ba67
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/138380
Tested-by: Jenkins
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>

desktop/source/app/crashreport.cxx

@@ -346,6 +346,7 @@ void CrashReporter::writeSystemInfo()
 #elif defined _WIN32
 void CrashReporter::writeSystemInfo()
 {
+#if !defined(_ARM64_)
     // Get CPU model name and flags.
     // See https://docs.microsoft.com/en-us/cpp/intrinsics/cpuid-cpuidex
     // and https://en.wikipedia.org/wiki/CPUID .
@@ -456,6 +457,7 @@ void CrashReporter::writeSystemInfo()
     }
     if( !flags.isEmpty())
         addKeyValue( "CPUFlags", flags.makeStringAndClear(), AddItem );
+#endif
     // Get total memory.
     MEMORYSTATUSEX memoryStatus;
     memoryStatus.dwLength = sizeof( memoryStatus );