Add new libcxx flag for disabling container overflow checks

libcxx changed the name of the macro used to include sanitizer container annotations.

We should add the new flag name to maintain current behavior.

Sanitizer container overflow checks are prone to false positives, so we default to disabling these on xcode projects.

rdar://149350723

Author: thetruestblue

Sources/SWBUniversalPlatform/Specs/Clang LLVM 1.0.xcspec

@@ -2736,6 +2736,7 @@
                     YES = ();
                     NO = (
                         "-D_LIBCPP_HAS_NO_ASAN",
+                        "-D_LIBCPP_HAS_ASAN=0",
                     );
                 };
                 Condition = "$(CLANG_ADDRESS_SANITIZER)";

Tests/SWBTaskConstructionTests/TaskConstructionTests.swift

@@ -4135,7 +4135,7 @@ fileprivate struct TaskConstructionTests: CoreBasedTests {
                     // There should be one CompileC task, which includes the ASan option, and which puts its output in a -asan directory.
                     results.checkTask(.matchTarget(target), .matchRuleType("CompileC")) { task in
                         task.checkRuleInfo([.equal("CompileC"), .equal("\(SRCROOT)/build/aProject.build/Debug/\(targetName).build/Objects-normal-asan/x86_64/SourceFile.o"), .suffix("SourceFile.m"), .any, .any, .any, .any])
-                        task.checkCommandLineContains(["\(core.developerPath.path.str)/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang", "-fsanitize=address", "-D_LIBCPP_HAS_NO_ASAN", "\(SRCROOT)/build/aProject.build/Debug/\(targetName).build/Objects-normal-asan/x86_64/SourceFile.o"])
+                        task.checkCommandLineContains(["\(core.developerPath.path.str)/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang", "-fsanitize=address", "-D_LIBCPP_HAS_NO_ASAN", "-D_LIBCPP_HAS_ASAN=0", "\(SRCROOT)/build/aProject.build/Debug/\(targetName).build/Objects-normal-asan/x86_64/SourceFile.o"])
                     }
 
                     // There should be one CompileSwiftSources task, which includes the ASan option, and which puts its output in a -asan directory.