[libc++][Android] Allow testing libc++ with clang-r536225 (#116149)

The Android clang-r536225 compiler identifies as Clang 19, but it is
based on commit fc57f88, which predates
the official LLVM 19.0.0 release.

Some tests need fixes:

* The sized delete tests fail because clang-r536225 leaves sized
deallocation off by default.

* std::array<T[0]> is true when this Android Clang version is used with
a trunk libc++, but we expect it to be false in the test. In practice,
Clang and libc++ usually come from the same commit on Android.

Author: rprichard

libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/sized_delete_array14.pass.cpp

@@ -11,6 +11,10 @@
 // These compiler versions don't enable sized deallocation by default.
 // UNSUPPORTED: clang-17, clang-18
 
+// Android clang-r536225 identifies as clang-19.0 but it predates the real
+// LLVM 19.0.0, so it also leaves sized deallocation off by default.
+// UNSUPPORTED: android && clang-19.0
+
 // UNSUPPORTED: sanitizer-new-delete, c++03, c++11
 // XFAIL: apple-clang
 // XFAIL: using-built-library-before-llvm-11

libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/sized_delete14.pass.cpp

@@ -11,6 +11,10 @@
 // These compiler versions do not enable sized deallocation by default.
 // UNSUPPORTED: clang-17, clang-18
 
+// Android clang-r536225 identifies as clang-19.0 but it predates the real
+// LLVM 19.0.0, so it also leaves sized deallocation off by default.
+// UNSUPPORTED: android && clang-19.0
+
 // UNSUPPORTED: sanitizer-new-delete, c++03, c++11
 // XFAIL: apple-clang
 // XFAIL: using-built-library-before-llvm-11

libcxx/test/std/utilities/meta/meta.unary/meta.unary.cat/is_array.pass.cpp

@@ -73,7 +73,15 @@ typedef void (*FunctionPtr)();
 int main(int, char**)
 {
     test_is_array<char[3]>();
+    // Android clang-r536225 identifies as clang-19.0, but it predates the
+    // LLVM 19.0.0 release. It lacks llvm.org/pr86652, which changed __is_array
+    // to return false for T[0]. llvm.org/pr93037 relies on that change for
+    // correct handling of std::is_array<T[0]>. This test will pass as long as
+    // Clang and libc++ come from the same LLVM commit, but we can't detect that
+    // here.
+#if !defined(__ANDROID__) || TEST_CLANG_VER != 1900
     test_is_not_array<char[0]>();
+#endif
     test_is_array<char[]>();
     test_is_array<Union[]>();