Don't say .so when we might mean .dylib or .dll...

Change-Id: I53a4d39f7e88fa73cabd275929f03d3da071cda7
diff --git a/build/Android.common.mk b/build/Android.common.mk
index 6c2041c..e62602c 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-# TODO: move the LLVM compiler out into a separate .so too...
+# TODO: move the LLVM compiler out into a separate shared library too...
 # Use llvm as the backend
 ifneq ($(wildcard art/USE_LLVM_COMPILER),)
 ART_USE_LLVM_COMPILER := true