Add a test.

The binary is as minimal as possible and it contains 1 segment named "__DWARF" with 3 sections:

FILE OFF    INDEX ADDRESS            SIZE               OFFSET     ALIGN      RELOFF     NRELOC     FLAGS      RESERVED1  RESERVED2  RESERVED3  NAME
=========== ===== ------------------ ------------------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------------------
0x00000068: [  1] 0x00000000fffffff0 0x0000000000000020 0xfffffff0 0x00000002 0x00000000 0x00000000 0x00000001 0x00000000 0x00000000 0x00000000 __DWARF.__debug_abbrev
0x000000b8: [  2] 0x0000000100000010 0x0000000200000000 0x00000010 0x00000002 0x00000000 0x00000000 0x00000001 0x00000000 0x00000000 0x00000000 __DWARF.__debug_info
0x00000108: [  3] 0x0000000300000010 0x0000000000000020 0x00000010 0x00000002 0x00000000 0x00000000 0x00000001 0x00000000 0x00000000 0x00000000 __DWARF.__debug_line

The file offsets should be parsed correctly by LLDB as:

__debug_abbrev file_offset=0x00000000fffffff0
__debug_info file_offset=0x0000000100000010
__debug_line file_offset=0x0000000300000010

Author: clayborg

lldb/test/Shell/ObjectFile/MachO/Inputs/section-overflow-binary

@@ -0,0 +1,13 @@
+RUN: %lldb -b %p/Inputs/section-overflow-binary \
+RUN:   -o 'script dwarf = lldb.target.module[0].sections[0]' \
+RUN:   -o 'script section = dwarf.GetSubSectionAtIndex(0)' \
+RUN:   -o "script print(f'{section.GetName()} file_offset=0x{section.GetFileOffset():016x}')" \
+RUN:   -o 'script section = dwarf.GetSubSectionAtIndex(1)' \
+RUN:   -o "script print(f'{section.GetName()} file_offset=0x{section.GetFileOffset():016x}')" \
+RUN:   -o 'script section = dwarf.GetSubSectionAtIndex(2)' \
+RUN:   -o "script print(f'{section.GetName()} file_offset=0x{section.GetFileOffset():016x}')" \
+RUN:   | FileCheck %s
+
+CHECK: __debug_abbrev file_offset=0x00000000fffffff0
+CHECK: __debug_info file_offset=0x0000000100000010
+CHECK: __debug_line file_offset=0x0000000300000010