Fix google-runtime-int warnings.

Bug: 28220065
Change-Id: Ida199c66692a1638be6990d583d2ed42583fb592
diff --git a/applypatch/utils.h b/applypatch/utils.h
index bc97f17..1c34edd 100644
--- a/applypatch/utils.h
+++ b/applypatch/utils.h
@@ -17,14 +17,15 @@
 #ifndef _BUILD_TOOLS_APPLYPATCH_UTILS_H
 #define _BUILD_TOOLS_APPLYPATCH_UTILS_H
 
+#include <inttypes.h>
 #include <stdio.h>
 
 // Read and write little-endian values of various sizes.
 
 void Write4(int value, FILE* f);
-void Write8(long long value, FILE* f);
+void Write8(int64_t value, FILE* f);
 int Read2(void* p);
 int Read4(void* p);
-long long Read8(void* p);
+int64_t Read8(void* p);
 
 #endif //  _BUILD_TOOLS_APPLYPATCH_UTILS_H