Port qemu-wasm backend to Espressif QEMU 9.2

configure

@@ -341,7 +341,7 @@ EOF
 }
 
 if check_define __EMSCRIPTEN__ ; then
-  host_os=linux
+  host_os=emscripten
 elif check_define __linux__ ; then
   host_os=linux
 elif check_define _WIN32 ; then
@@ -553,7 +553,7 @@ else
     host_bits=32
 fi
 
-if test -n "$host_arch" && {
+if test -n "$host_arch" && test "$host_arch" != wasm32 && {
     ! test -d "$source_path/linux-user/include/host/$host_arch" ||
     ! test -d "$source_path/common-user/host/$host_arch"; }; then
     error_exit "linux-user/include/host/$host_arch does not exist." \