[cxx-interop] Fix ambiguous 'exit' (same solution as above).

Author: zoecarver

lib/ClangImporter/ImportDecl.cpp

@@ -3208,7 +3208,7 @@ namespace {
             return false;
           return d->getName() == "abs" || d->getName() == "div" ||
               d->getName() == "strstr" || d->getName() == "sin" ||
-              d->getName() == "cos";
+              d->getName() == "cos" || d->getName() == "exit";
         };
         if (decl->getOwningModule() &&
             (decl->getOwningModule()

test/Interop/Cxx/stdlib/avoid-import-cxx-math.swift

@@ -21,4 +21,6 @@ func test() {
     let _ = CxxStdlib.abs(x) // expected-error {{module 'CxxStdlib' has no member named 'abs'}}
     let _ = CxxStdlib.div(x) // expected-error {{module 'CxxStdlib' has no member named 'div'}}
     let _ = CxxStdlib.strstr("a", "aaa") // expected-error {{module 'CxxStdlib' has no member named 'strstr'}}
+  
+    exit(0)
 }