Remove _GLOBAL_OFFSET_TABLE_ from mips' libstdc++.so.variables.txt

Change-Id: Ie74d6ece0a76eceb41bfc83b2652b50c7e8be159
diff --git a/ndk/platforms/android-20/arch-mips64/symbols/libstdc++.so.variables.txt b/ndk/platforms/android-20/arch-mips64/symbols/libstdc++.so.variables.txt
index 1fc475d..d5aab66 100644
--- a/ndk/platforms/android-20/arch-mips64/symbols/libstdc++.so.variables.txt
+++ b/ndk/platforms/android-20/arch-mips64/symbols/libstdc++.so.variables.txt
@@ -1,3 +1,2 @@
-_GLOBAL_OFFSET_TABLE_
 _ZSt7nothrow
 _ZTV9type_info