Enable -Wextra-semi and -Wextra-semi-stmt.

This will prevent users from accidentally making semicolon errors in
the future.

Bug: chromium:926235
Change-Id: I79a6fa376fb1ad8f0fcf1b65b1f572a035d1f4e9
Reviewed-on: https://chromium-review.googlesource.com/c/1446493
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
diff --git a/src/libANGLE/Framebuffer.cpp b/src/libANGLE/Framebuffer.cpp
index c4e83d1..ec99a04 100644
--- a/src/libANGLE/Framebuffer.cpp
+++ b/src/libANGLE/Framebuffer.cpp
@@ -143,7 +143,7 @@
     }
 
     return true;
-};
+}
 
 bool CheckAttachmentSampleCompleteness(const Context *context,
                                        const FramebufferAttachment &attachment,