[lld][ELF][Hexagon] add more relocations

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@176277 91177308-0d34-0410-b5e6-96231b3b80d8
[ELF][Hexagon] change Header flags

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@176278 91177308-0d34-0410-b5e6-96231b3b80d8
[ELF] Set header flags to 0 by default

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@176279 91177308-0d34-0410-b5e6-96231b3b80d8
[ELF][tests] changes for test cases

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@176280 91177308-0d34-0410-b5e6-96231b3b80d8