Driver: Dissect -Wl, and -Xlinker arguments to remove --no-demangle, which was a
collect2 option that is passed by some projects (notably WebKit).

llvm-svn: 105964
diff --git a/clang/test/Driver/Xlinker-args.c b/clang/test/Driver/Xlinker-args.c
new file mode 100644
index 0000000..fff8fa0
--- /dev/null
+++ b/clang/test/Driver/Xlinker-args.c
@@ -0,0 +1,9 @@
+// Check that we extract --no-demangle from '-Xlinker' and '-Wl,', since that
+// was a collect2 argument.
+
+// RUN: %clang --ccc-host-triple i386-apple-darwin9 -### \
+// RUN:   -Xlinker one -Xlinker --no-demangle \
+// RUN:   -Wl,two,--no-demangle,three -Xlinker four %s 2> %t
+// RUN: FileCheck < %t %s
+//
+// CHECK: "one" "two" "three" "four"