Remove build dependency on unnecessary LLVMObjCARCOpts library.
Remove build dependency on unnecessary LLVMObjCARCOpts library.

mohtamohit/CppSharp,ktopouzi/CppSharp,mono/CppSharp,inordertotest/CppSharp,SonyaSa/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,SonyaSa/CppSharp,mydogisbox/CppSharp,u255436/CppSharp,mohtamohit/CppSharp,mydogisbox/CppSharp,ktopouzi/CppSharp,ddobrev/CppSharp,genuinelucifer/CppSharp,ktopouzi/CppSharp,SonyaSa/CppSharp,inordertotest/CppSharp,SonyaSa/CppSharp,inordertotest/CppSharp,mohtamohit/CppSharp,SonyaSa/CppSharp,u255436/CppSharp,u255436/CppSharp,mohtamohit/CppSharp,ktopouzi/CppSharp,mono/CppSharp,zillemarco/CppSharp,genuinelucifer/CppSharp,zillemarco/CppSharp,mydogisbox/CppSharp,mono/CppSharp,mono/CppSharp,u255436/CppSharp,inordertotest/CppSharp,genuinelucifer/CppSharp,genuinelucifer/CppSharp,mono/CppSharp,mydogisbox/CppSharp,zillemarco/CppSharp,inordertotest/CppSharp,zillemarco/CppSharp,zillemarco/CppSharp,ddobrev/CppSharp,mohtamohit/CppSharp,genuinelucifer/CppSharp,mono/CppSharp,ktopouzi/CppSharp,u255436/CppSharp,mydogisbox/CppSharp