Fix compiling for iOS
SecTrustCopyAnchorCertificates
is not available for iOS
/Users/runner/src/buildtrees/qca/src/v2.3.1-8bca00194b.clean/src/qca_systemstore_mac.cpp:37:5: error: use of undeclared identifier 'SecTrustCopyAnchorCertificates'
if(SecTrustCopyAnchorCertificates(&anchors) != 0)
^
1 error generated.