mdadm: Specify enough length when write to buffer

In Detail.c the buffer path in function Detail is defined as path[200],
in fact the max lenth of content which needs to write to the buffer is
287. Because the length of dname of struct dirent is 255.
During building it reports error:
error: ‘%s’ directive writing up to 255 bytes into a region of size 189
[-Werror=format-overflow=]

In function examine_super0 there is a buffer nb with length 5.
But it need to show a int type argument. The lenght of max
number of int is 10. So the buffer length should be 11.

In human_size function the length of buf is 30. During building
there is a error:
output between 20 and 47 bytes into a destination of size 30.
Change the length to 47.

Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>

Detail.c

@@ -575,7 +575,7 @@ This is pretty boring
 			printf("  Member Arrays :");
 
 			while (dir && (de = readdir(dir)) != NULL) {
-				char path[200];
+				char path[287];
 				char vbuf[1024];
 				int nlen = strlen(sra->sys_name);
 				dev_t devid;

super0.c

@@ -231,7 +231,7 @@ static void examine_super0(struct supertype *st, char *homehost)
 	     d++) {
 		mdp_disk_t *dp;
 		char *dv;
-		char nb[5];
+		char nb[11];
 		int wonly, failfast;
 		if (d>=0) dp = &sb->disks[d];
 		else dp = &sb->this_disk;

util.c

@@ -811,7 +811,7 @@ unsigned long calc_csum(void *super, int bytes)
 #ifndef MDASSEMBLE
 char *human_size(long long bytes)
 {
-	static char buf[30];
+	static char buf[47];
 
 	/* We convert bytes to either centi-M{ega,ibi}bytes or
 	 * centi-G{igi,ibi}bytes, with appropriate rounding,