[DeviceSanitizer] When link with libc++, link the gcc_s first. #2478
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When trying to static link the libc++, some namespace-less/common symbols got resolved to libc++/libc++abi/libunwind first before it got a chance to resolve to libstdc++ and related libs. This causes a stdlib mismatch problem and leads to one device sanitizer test(options-invalid-values.cpp) SEGV when trying to throw an exception.
By putting
gcc_s
first, we can prevent such a problem.