update clang/flang sources to flang_release_50 branch
# when gcc-5.3+ appear in all the targeted Linux distros.
%global gnuver 7.2.0
-%global clang_sha 1210030915d1e1441d62eea54976f4ced7f6ad88
-%global flang_sha cab3fc47849d7ba8effef8474b9aae2cc60e8c57
+%global clang_sha b11539abc46cbd19189c5719d1e30539de3a93b9
+%global flang_sha 37e86e06f74d9bd91ef6bb511c026753b9124006
%global pname llvm5-compilers
%global major_ver 5
