Inherit appropiate environment variables in goma module for goma_utils.py

scripts/slave/goma_utils.py

Index: scripts/slave/goma_utils.py
diff --git a/scripts/slave/goma_utils.py b/scripts/slave/goma_utils.py
index 1485300d2419c98feea00853759c1d97ec89cc95..b232c2f31aa12d1c752d099161b68b67caaf2291 100644
--- a/scripts/slave/goma_utils.py
+++ b/scripts/slave/goma_utils.py
@@ -60,12 +60,17 @@ def GetLatestGlogInfoFile(pattern):
   Returns:
     the latest glog INFO filename in fullpath.
   """
-  dirname = GetGomaTmpDirectory()
-  info_pattern = os.path.join(dirname, '%s.*.INFO.*' % pattern)
-  candidates = glob.glob(info_pattern)
-  if not candidates:
-    return None
-  return sorted(candidates, reverse=True)[0]
+  for dirname in [os.environ.get('GLOG_log_dir'),
+                  GetGomaTmpDirectory()]:
+    if not dirname:
+      continue
+    info_pattern = os.path.join(dirname, '%s.*.INFO.*' % pattern)
+    candidates = glob.glob(info_pattern)
+    if not candidates:
+      continue
+    return sorted(candidates, reverse=True)[0]
+
+  return None
 
 
 def GetLatestGomaCompilerProxyInfo():