Unnecessary relocation with __aeabi_unwind_cpp_pr0

[llvmbot]

Bugzilla Link	25865
Version	trunk
OS	Linux
Reporter	LLVM Bugzilla Contributor
CC	@compnerd

Extended Description

Given

    .fnstart
    .fnend

    .fnstart
    .fnend

gas produces one relocation to __aeabi_unwind_cpp_pr0, MC produces two.