Changed asan host detection to use short hostname

tools/clang/scripts/update.sh

Index: tools/clang/scripts/update.sh
diff --git a/tools/clang/scripts/update.sh b/tools/clang/scripts/update.sh
index 783875aa1f2bc37f9630d270826142f3fcb1c7de..b32b10856d779ded8c7bbe520615fccc39f7001d 100755
--- a/tools/clang/scripts/update.sh
+++ b/tools/clang/scripts/update.sh
@@ -90,19 +90,19 @@ function on_asan_mac_host {
   if [[ "${OS}" != "Darwin" ]]; then
     return 1
   fi
-  HOST="$(uname -n)"
+  HOST="$(hostname -s)"
   # Chrome Mac ASan Builder.
-  if [[ "${HOST}" == "vm633-m1.golo.chromium.org" ]]; then
+  if [[ "${HOST}" == "vm633-m1" ]]; then
     return 0
   fi
   # Chrome Mac ASan LKGR.
-  if [[ "${HOST}" == "mini11-a1.chrome.corp.google.com" ]]; then
+  if [[ "${HOST}" == "mini11-a1" ]]; then
     return 0
   fi
   # mac_asan trybots.
   for num in $(jot - 600 655)
   do
-    if [[ "${HOST}" == "vm${num}-m4.golo.chromium.org" ]]; then
+    if [[ "${HOST}" == "vm${num}-m4" ]]; then
       return 0
     fi
   done