en_US.UTF-8 is also supported.

Change-Id: Ic35fad3596dc5e24ee8ae35543a274a471f27bb2
(cherry picked from commit 1abb8bd21d64c2bd21258469b688483f821974d5)
diff --git a/libc/bionic/locale.cpp b/libc/bionic/locale.cpp
index 5a1da43..363140e 100644
--- a/libc/bionic/locale.cpp
+++ b/libc/bionic/locale.cpp
@@ -79,7 +79,9 @@
 
 static bool __is_supported_locale(const char* locale) {
   return (strcmp(locale, "") == 0 ||
-          strcmp(locale, "C") == 0 || strcmp(locale, "C.UTF-8") == 0 ||
+          strcmp(locale, "C") == 0 ||
+          strcmp(locale, "C.UTF-8") == 0 ||
+          strcmp(locale, "en_US.UTF-8") == 0 ||
           strcmp(locale, "POSIX") == 0);
 }