Use an ELF alias for strerror_l().

Change-Id: Ic7416656feab80eed707bed2708c531ecb711a7b
diff --git a/libc/bionic/strerror.cpp b/libc/bionic/strerror.cpp
index 743130d..c41b547 100644
--- a/libc/bionic/strerror.cpp
+++ b/libc/bionic/strerror.cpp
@@ -102,3 +102,4 @@
   strerror_r(error_number, result, sizeof(tls.strerror_buf));
   return result;
 }
+__strong_alias(strerror_l, strerror);