[gdb] Make maint info sections print relocated addresses
    
    When running gdb.base/compare-sections.exp with -fPIE/-pie, we get:
    ...
    print /u *(unsigned char *) 0x00000238^M
    Cannot access memory at address 0x238^M
    (gdb) FAIL: gdb.base/compare-sections.exp: read-only: get value of read-only section
    ...
    
    The problem is that that "maint info sections" prints an unrelocated address:
    ...
     [0]     0x00000238->0x00000254 at 0x00000238: .interp ALLOC LOAD READONLY \
                                                           DATA HAS_CONTENTS
    ...
    while the test expects a relocated address.
    
    Given that the documentation states that the command displays "the section
    information displayed by info files", and that info files shows relocated
    addresses:
    ...
            0x0000555555554238 - 0x0000555555554254 is .interp
    ...
    fix this by showing relocated addresses for maint info sections as
    well.
    
    Build and tested on x86_64-linux.
    
    gdb/ChangeLog:
    
    2019-08-16  Tom de Vries  <tdevries@suse.de>
    
    	* maint.c (maintenance_info_sections): Also handle !ALLOBJ case using
    	print_objfile_section_info.