libmemunreachable: clang-format everything

clang-format -i --sort-includes $(find . -name "*.cpp" -o -name "*.h")

Test: builds
Change-Id: Ia8e0677fe7f3f26dddba3a851cd2dfab9f14e421
diff --git a/libmemunreachable/ProcessMappings.h b/libmemunreachable/ProcessMappings.h
index d3b7496..81b33dc 100644
--- a/libmemunreachable/ProcessMappings.h
+++ b/libmemunreachable/ProcessMappings.h
@@ -33,4 +33,4 @@
 // the line data.
 bool ProcessMappings(pid_t pid, allocator::vector<Mapping>& mappings);
 
-#endif // LIBMEMUNREACHABLE_PROCESS_MAPPING_H_
+#endif  // LIBMEMUNREACHABLE_PROCESS_MAPPING_H_