libcutils: Reflect the naming change, __ARM_HAVE_LDREX_STREX, in bionic

This patch reflect the changes that macro  _ARM_HAVE_LDREX_STREX had
been renamed to __ARM_HAVE_LDREX_STREX in bionic.

Change-Id: I03e8b9f95bdf6ed0da1f53326170f6ee57a37066
1 file changed