NaCl: Fix nacl_io library to build with -Wstrict-prototypes

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3114
TEST=compile "nacl_io_untrusted" ninja target

Review URL: https://codereview.chromium.org/320103004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276023 0039d316-1c4b-4281-b951-d872f2087c98

native_client_sdk/src/libraries/nacl_io/h_errno.c

@@ -12,11 +12,11 @@
 static pthread_key_t s_h_errno_key;
 static pthread_once_t s_h_errno_once = PTHREAD_ONCE_INIT;
 
-static void __h_errno_create() {
+static void __h_errno_create(void) {
   pthread_key_create(&s_h_errno_key, NULL);
 }
 
-int *__h_errno_location() {
+int *__h_errno_location(void) {
   int* h_errno_ptr;
   pthread_once(&s_h_errno_once, __h_errno_create);
   h_errno_ptr = (int *) pthread_getspecific(s_h_errno_key);
@@ -31,7 +31,7 @@ int *__h_errno_location() {
 }
 
 #if defined(__BIONIC__)
-int *__get_h_errno() {
+int *__get_h_errno(void) {
   return __h_errno_location();
 }
 #endif

native_client_sdk/src/libraries/nacl_io/kernel_intercept.h

@@ -46,7 +46,7 @@ int ki_init(void* kernel_proxy);
  * use this to save the current state before calling ki_init().  The
  * pushed state is restored in the next call to ki_uninit().
  */
-int ki_push_state_for_testing();
+int ki_push_state_for_testing(void);
 
 int ki_init_ppapi(void* kernel_proxy,
                   PP_Instance instance,
@@ -62,8 +62,8 @@ int ki_init_interface(void* kernel_proxy, void* pepper_interface);
 nacl_io::KernelProxy* ki_get_proxy();
 #endif
 
-int ki_is_initialized();
-void ki_uninit();
+int ki_is_initialized(void);
+void ki_uninit(void);
 
 int ki_chdir(const char* path);
 void ki_exit(int status);

native_client_sdk/src/libraries/nacl_io/kernel_wrap.h

@@ -55,8 +55,8 @@ typedef ssize_t write_ssize_t;
 
 EXTERN_C_BEGIN
 
-void kernel_wrap_init();
-void kernel_wrap_uninit();
+void kernel_wrap_init(void);
+void kernel_wrap_uninit(void);
 
 int NAME(access)(const char* path, int amode) NOTHROW;
 int NAME(chdir)(const char* path) NOTHROW;