Silence -Wincompatible-pointer-types-discards-qualifiers warning. n-i-bz.

Silence -Wincompatible-pointer-types-discards-qualifiers warning. n-i-bz.

m_replacemalloc/vg_replace_malloc.c:1286:1: warning: returning 'const char *' from a function with result type 'char *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
ZONE_GET_NAME(VG_Z_LIBC_SONAME, malloc_get_zone_name);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
m_replacemalloc/vg_replace_malloc.c:1283:14: note: expanded from macro 'ZONE_GET_NAME'
      return vg_default_zone.zone_name; \
             ^~~~~~~~~~~~~~~~~~~~~~~~~
m_replacemalloc/vg_replace_malloc.c:1287:1: warning: returning 'const char *' from a function with result type 'char *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
ZONE_GET_NAME(SO_SYN_MALLOC,    malloc_get_zone_name);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
m_replacemalloc/vg_replace_malloc.c:1283:14: note: expanded from macro 'ZONE_GET_NAME'
      return vg_default_zone.zone_name; \
             ^~~~~~~~~~~~~~~~~~~~~~~~~
m_replacemalloc/vg_replace_malloc.c:1286:1: warning: returning 'const char *' from a function with result type 'char *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
ZONE_GET_NAME(VG_Z_LIBC_SONAME, malloc_get_zone_name);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
m_replacemalloc/vg_replace_malloc.c:1283:14: note: expanded from macro 'ZONE_GET_NAME'
      return vg_default_zone.zone_name; \
             ^~~~~~~~~~~~~~~~~~~~~~~~~
m_replacemalloc/vg_replace_malloc.c:1287:1: warning: returning 'const char *' from a function with result type 'char *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
ZONE_GET_NAME(SO_SYN_MALLOC,    malloc_get_zone_name);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
m_replacemalloc/vg_replace_malloc.c:1283:14: note: expanded from macro 'ZONE_GET_NAME'
      return vg_default_zone.zone_name; \
             ^~~~~~~~~~~~~~~~~~~~~~~~~

No regressions on OS X 10.10

Before:

== 596 tests, 219 stderr failures, 10 stdout failures, 0 stderrB failures, 0 stdoutB failures, 30 post failures ==

After:

== 596 tests, 219 stderr failures, 10 stdout failures, 0 stderrB failures, 0 stdoutB failures, 30 post failures ==

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15712