s/^I/    / ...

Change-Id: I30fab9e4df24feba5dc560fe13b000afffe13c57
diff --git a/tools/cpp/CROSSTOOL b/tools/cpp/CROSSTOOL
index baa91b7..911ab1f 100644
--- a/tools/cpp/CROSSTOOL
+++ b/tools/cpp/CROSSTOOL
@@ -164,10 +164,10 @@
       action: "c++-header-parsing"
       action: "c++-header-preprocessing"
       action: "c++-module-compile"
-	  flag_group {
+      flag_group {
         # We always want to compile with -pthread semantics.
-	    flag: "-pthread"
-	  }
+        flag: "-pthread"
+      }
     }
   }