update to DR r1572 for: 1) DRi#888 fix to allow invoking drsym routines from a    drsym enumeration, which is required for i#986; 2) DRi#863 fix to avoid a leak when -replace_malloc    aborts on OOM, which is required for i#986 tests.
update to DR r1572 for:
1) DRi#888 fix to allow invoking drsym routines from a
   drsym enumeration, which is required for i#986;
2) DRi#863 fix to avoid a leak when -replace_malloc
   aborts on OOM, which is required for i#986 tests.


SVN-Revision: 1010

LohithBlaze/drmemory,sigma-random/drmemory,code4bones/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,code4bones/drmemory,code4bones/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,sigma-random/drmemory,code4bones/drmemory,LohithBlaze/drmemory,code4bones/drmemory,LohithBlaze/drmemory