Use rlim_t for the arguments in minijail_rlimit()

This changes the type used to pass the value of the limit from uint32_t
to rlim_t, which makes it possible to pass in RLIM_INFINITY in 64-bit
environments.

Bug: None
Test: minijail_rlimit(j, RLIMIT_STACK, RLIM_INFINITY, RLIM_INFINITY);
Change-Id: I6bbf956974c7f28a2e0bb8ad3efb4d25c5675593
diff --git a/libminijail.h b/libminijail.h
index 46dc311..04e4153 100644
--- a/libminijail.h
+++ b/libminijail.h
@@ -16,6 +16,7 @@
 #define _LIBMINIJAIL_H_
 
 #include <stdint.h>
+#include <sys/resource.h>
 #include <sys/types.h>
 
 #ifdef __cplusplus
@@ -128,7 +129,7 @@
 int minijail_use_alt_syscall(struct minijail *j, const char *table);
 
 /* Sets the given runtime limit. See getrlimit(2). */
-int minijail_rlimit(struct minijail *j, int type, uint32_t cur, uint32_t max);
+int minijail_rlimit(struct minijail *j, int type, rlim_t cur, rlim_t max);
 
 /*
  * Adds the jailed process to the cgroup given by |path|.  |path| should be the