Meson: Fix compilation with CLangCL

Support for __uint128_t in CLangCL is currently broken [1].
Avoid using that type for now.

As of today MSVC doesn't support 128-bit integral types;
with this change we get feature-parity between MSVC and
CLangCL, so this shouldn't be a problem.

References:

 * Clang-cl generates a call to an undefined symbol __udivti3
   https://github.com/llvm/llvm-project/issues/25679

meson.build

@@ -148,9 +148,13 @@ check_headers = [
 check_types = [
   ['uint64_t', {'headers': ['stdint.h']}],
   ['uint128_t', {'headers': ['stdint.h']}],
-  ['__uint128_t']
 ]
 
+# https://github.com/llvm/llvm-project/issues/25679
+if cc.get_id() != 'clang-cl'
+  check_types += [ ['__uint128_t'] ]
+endif
+
 check_funcs = [
   'alarm',
   'ctime_r',