tools/mtd-utils: update to 2.1.5

Release Notes:
https://lore.kernel.org/buildroot/c0992bbb-9487-9a51-ea9f-39cf074b61ec@sigma-star.at/

Refresh patches:
- 130-lzma_jffs2.patch
- 320-mkfs.jffs2-SOURCE_DATE_EPOCH.patch

Signed-off-by: Nick Hainke <vincent@systemli.org>

tools/mtd-utils/Makefile

@@ -7,12 +7,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mtd-utils
-PKG_VERSION:=2.1.4
+PKG_VERSION:=2.1.5
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://infraroot.at/pub/mtd/
-PKG_HASH:=2c6711d15d282c47cb3867b6857340597e26d332c238465134c602e5eef71b99
+PKG_HASH:=386e27fd121699b6b729bc2e8e04dda987b31cca6b16e12fb6cc6dcf26449f46
 
 PKG_FIXUP:=autoreconf
 

tools/mtd-utils/patches/130-lzma_jffs2.patch

@@ -5020,7 +5020,7 @@
 +}
 --- a/jffsX-utils/mkfs.jffs2.c
 +++ b/jffsX-utils/mkfs.jffs2.c
-@@ -1667,11 +1667,11 @@ int main(int argc, char **argv)
+@@ -1668,11 +1668,11 @@ int main(int argc, char **argv)
  						  }
  						  erase_block_size *= units;
  

tools/mtd-utils/patches/320-mkfs.jffs2-SOURCE_DATE_EPOCH.patch

@@ -20,7 +20,7 @@
  	}
  
  	entry = xcalloc(1, sizeof(struct filesystem_entry));
-@@ -1558,6 +1558,20 @@ static void parse_image(void){
+@@ -1559,6 +1559,20 @@ static void parse_image(void){
  	close(in_fd);
  }
  
@@ -41,7 +41,7 @@
  int main(int argc, char **argv)
  {
  	int c, opt;
-@@ -1576,6 +1590,7 @@ int main(int argc, char **argv)
+@@ -1577,6 +1591,7 @@ int main(int argc, char **argv)
  		warn_page_size = 1; /* warn user if page size not 4096 */
  
  	jffs2_compressors_init();
@@ -49,7 +49,7 @@
  
  	while ((opt = getopt_long(argc, argv,
  					"D:d:r:s:o:qUPfh?vVe:lbp::nc:m:x:X:Lty:i:", long_options, &c)) >= 0)
-@@ -1626,7 +1641,7 @@ int main(int argc, char **argv)
+@@ -1627,7 +1642,7 @@ int main(int argc, char **argv)
  				break;
  
  			case 'f':