Wrong source when using `-S` in objdump

[Albert Netymk]

test.c
```
void my_fun(int *arr, int N)
{
    int sum = 0;
    for (int i = 0; i < N; ++i) {
        sum += arr[i];
    }
}

int main(void)
{
    return 0;
}
```
clang -c -g test.c ; objdump -S test.o > test.s

`my_fun` appears twice in the disassembly code.
Excerpt of test.s:
```
void my_fun(int *arr, int N)
{
   0:   55                      push   %rbp
   1:   48 89 e5                mov    %rsp,%rbp
   4:   48 89 7d f8             mov    %rdi,-0x8(%rbp)
   8:   89 75 f4                mov    %esi,-0xc(%rbp)
    int sum = 0;
   b:   c7 45 f0 00 00 00 00    movl   $0x0,-0x10(%rbp)
    for (int i = 0; i < N; ++i) {
  12:   c7 45 ec 00 00 00 00    movl   $0x0,-0x14(%rbp)
  19:   8b 45 ec                mov    -0x14(%rbp),%eax
  1c:   3b 45 f4                cmp    -0xc(%rbp),%eax
  1f:   0f 8d 21 00 00 00       jge    46 <my_fun+0x46>
        sum += arr[i];
  25:   48 63 45 ec             movslq -0x14(%rbp),%rax
  29:   48 8b 4d f8             mov    -0x8(%rbp),%rcx
  2d:   8b 14 81                mov    (%rcx,%rax,4),%edx
  30:   03 55 f0                add    -0x10(%rbp),%edx
  33:   89 55 f0                mov    %edx,-0x10(%rbp)
void my_fun(int *arr, int N)
{
    int sum = 0;
    for (int i = 0; i < N; ++i) {
  36:   8b 45 ec                mov    -0x14(%rbp),%eax
  39:   05 01 00 00 00          add    $0x1,%eax
  3e:   89 45 ec                mov    %eax,-0x14(%rbp)
  41:   e9 d3 ff ff ff          jmpq   19 <my_fun+0x19>
        sum += arr[i];
    }
}
```

clang:
Ubuntu clang version 3.6.2-svn240577-1~exp1 (branches/release_36)
(based on LLVM 3.6.2) Target: x86_64-pc-linux-gnu
Thread model: posix
objdump:
GNU objdump (GNU Binutils for Ubuntu) 2.24
-- 
Best Regards

Yours faithfully
Albert Netymk