Add armv8l virtualized 32-bit ARM core detection (backports dotnet#66477) (dotnet#75528)

Author: ayakael

eng/native/configureplatform.cmake

@@ -36,7 +36,7 @@ if(CLR_CMAKE_HOST_OS STREQUAL Linux)
         # "amd64" string. Accept either of the two here.
         if(CMAKE_SYSTEM_PROCESSOR STREQUAL x86_64 OR CMAKE_SYSTEM_PROCESSOR STREQUAL amd64)
             set(CLR_CMAKE_HOST_UNIX_AMD64 1)
-        elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL armv7l)
+        elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL armv7l OR CMAKE_SYSTEM_PROCESSOR STREQUAL armv8l)
             set(CLR_CMAKE_HOST_UNIX_ARM 1)
             set(CLR_CMAKE_HOST_UNIX_ARMV7L 1)
         elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL arm OR CMAKE_SYSTEM_PROCESSOR STREQUAL armv7-a)

eng/native/configuretools.cmake

@@ -53,7 +53,8 @@ if(NOT WIN32 AND NOT CLR_CMAKE_TARGET_BROWSER)
     if(CLR_CMAKE_TARGET_ANDROID)
       set(TOOLSET_PREFIX ${ANDROID_TOOLCHAIN_PREFIX})
     elseif(CMAKE_CROSSCOMPILING AND NOT DEFINED CLR_CROSS_COMPONENTS_BUILD AND (CMAKE_SYSTEM_PROCESSOR STREQUAL armv7l OR
-       CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64 OR CMAKE_SYSTEM_PROCESSOR STREQUAL arm OR CMAKE_SYSTEM_PROCESSOR STREQUAL s390x))
+        CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64 OR CMAKE_SYSTEM_PROCESSOR STREQUAL arm OR CMAKE_SYSTEM_PROCESSOR STREQUAL s390x OR
+        CMAKE_SYSTEM_PROCESSOR STREQUAL armv8l))
       set(TOOLSET_PREFIX "${TOOLCHAIN}-")
     else()
       set(TOOLSET_PREFIX "")

eng/native/init-os-and-arch.sh

@@ -41,7 +41,7 @@ case "$CPUName" in
         arch=x64
         ;;
 
-    armv7l)
+    armv7l|armv8l)
         if (NAME=""; . /etc/os-release; test "$NAME" = "Tizen"); then
             arch=armel
         else