Modify any lines with libc.so!libc.so to libc.so.

I had made this change if there was an offset on the line,
but I didn't make if there is no offset present. Add the
no offset present case.

Bug: 206463081

Test: Ran unit tests.
Test: Modified a normal stack line with libart.so to be
Test: libart.so!libart.so and verified the line numbers
Test: are still present.
Change-Id: I75e3fbe5eaa3a5419a2dca2c4542731c61c7b971
1 file changed