Re-order virally misplaced namespace comments.

Noticed these were out of place when I tried to copy a file to use as a
template for a new file.

namespace android {
namespace aidl {
...
} // namespace android
} // namespace aidl

=>

namespace android {
namespace aidl {
...
} // namespace aidl
} // namespace android

Bug: N/A
Test: clang-format upload hook is happy
Change-Id: I2893b088c2a0e6b8fd2d09f0a11af5a0877599f1
diff --git a/line_reader.cpp b/line_reader.cpp
index 5e076d8..66446c0 100644
--- a/line_reader.cpp
+++ b/line_reader.cpp
@@ -87,5 +87,5 @@
   return unique_ptr<LineReader>(new MemoryLineReader(contents));
 }
 
-}  // namespace android
 }  // namespace aidl
+}  // namespace android