Fix INSTALL_PATH of Mac framework
Fix INSTALL_PATH of Mac framework

Otherwise targets that link against the framework look for it in
/Library/Frameworks

JinlianWang/OHHTTPStubs,virajs/OHHTTPStubs,SummerHanada/OHHTTPStubs,liufeigit/OHHTTPStubs,virajs/OHHTTPStubs,bruceflowers/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,SummerHanada/OHHTTPStubs,manuyavuz/OHHTTPStubs,oenius/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,virajs/OHHTTPStubs,tarbrain/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,sessuru/OHHTTPStubs,kazmasaurus/OHHTTPStubs,hirohisa/OHHTTPStubs,bruceflowers/OHHTTPStubs,SummerHanada/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,ThomWee/OHHTTPStubs,JinlianWang/OHHTTPStubs,oenius/OHHTTPStubs,kazmasaurus/OHHTTPStubs,tarbrain/OHHTTPStubs,JinlianWang/OHHTTPStubs,hirohisa/OHHTTPStubs,ThomWee/OHHTTPStubs,manuyavuz/OHHTTPStubs,oenius/OHHTTPStubs,bruceflowers/OHHTTPStubs,tarbrain/OHHTTPStubs,sessuru/OHHTTPStubs,virajs/OHHTTPStubs,SummerHanada/OHHTTPStubs,hirohisa/OHHTTPStubs,sessuru/OHHTTPStubs,manuyavuz/OHHTTPStubs,hirohisa/OHHTTPStubs,liufeigit/OHHTTPStubs,JinlianWang/OHHTTPStubs,tarbrain/OHHTTPStubs,kazmasaurus/OHHTTPStubs,oenius/OHHTTPStubs,ThomWee/OHHTTPStubs,liufeigit/OHHTTPStubs,ThomWee/OHHTTPStubs