Remove extra semicolon at end of namespace

Upcoming clang update to r328903 adds a new warning:
  warning: extra ';' outside of a function is incompatible with C++98
  [-Wc++98-compat-extra-semi]

which is included in -Weverything.

We can just delete the extra semicolon (even though we use gnu99), and
save the extra byte.

Test: Build

Change-Id: I49b6e6af483e011632e6a34c0663c93e5c385aa6

libutils/include/utils/Errors.h

@@ -81,8 +81,8 @@ enum {
 # define NO_ERROR 0L
 #endif
 
-}; // namespace android
-    
+}  // namespace android
+
 // ---------------------------------------------------------------------------
     
 #endif // ANDROID_ERRORS_H

libutils/include/utils/LightRefBase.h

@@ -69,4 +69,4 @@ public:
     virtual ~VirtualLightRefBase() = default;
 };
 
-}; // namespace android
+}  // namespace android

libutils/include/utils/RefBase.h

@@ -683,7 +683,7 @@ void move_backward_type(wp<TYPE>* d, wp<TYPE> const* s, size_t n) {
     ReferenceMover::move_references(d, s, n);
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 

libutils/include/utils/String16.h

@@ -243,7 +243,7 @@ inline String16::operator const char16_t*() const
     return mString;
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 

libutils/include/utils/StrongPointer.h

@@ -239,7 +239,7 @@ void sp<T>::set_pointer(T* ptr) {
     m_ptr = ptr;
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 

libutils/include/utils/TypeHelpers.h

@@ -329,7 +329,7 @@ template <typename T> inline hash_t hash_type(T* const & value) {
     return hash_type(uintptr_t(value));
 }
 
-}; // namespace android
+}  // namespace android
 
 // ---------------------------------------------------------------------------
 

libutils/include/utils/misc.h

@@ -35,6 +35,6 @@ typedef void (*sysprop_change_callback)(void);
 void add_sysprop_change_callback(sysprop_change_callback cb, int priority);
 void report_sysprop_change();
 
-}; // namespace android
+}  // namespace android
 
 #endif // _LIBS_UTILS_MISC_H