[gn build] Port 0218ea4

Author: llvmgnsyncbot

llvm/utils/gn/secondary/libcxx/include/BUILD.gn

@@ -184,6 +184,7 @@ if (current_toolchain == default_toolchain) {
       "__algorithm/ranges_copy_n.h",
       "__algorithm/ranges_count.h",
       "__algorithm/ranges_count_if.h",
+      "__algorithm/ranges_ends_with.h",
       "__algorithm/ranges_equal.h",
       "__algorithm/ranges_equal_range.h",
       "__algorithm/ranges_fill.h",