Added new firmware signature

src/binwalk/magic/binwalk

@@ -2087,6 +2087,10 @@
 # http://forum.xda-developers.com/showthread.php?p=47818657
 0	string	imgARMcC 		Roku aimage SB{offset-adjust:-8}
 
+# Boot ROM images for Sun/Cobalt Linux server appliances
+0       string	Cobalt\ Networks\ Inc.\nFirmware\ v	Paged Sun/COBALT boot rom,
+>38     string	x        				version: "%.4s"
+
 # Tag Image File Format, from Daniel Quinlan (quinlan@yggdrasil.com)
 # The second word of TIFF files is the TIFF version number, 42, which has
 # never changed.  The TIFF specification recommends testing for it.

src/magic/firmware

@@ -448,3 +448,7 @@
 # http://forum.xda-developers.com/showthread.php?p=47818657
 0	string	imgARMcC 		Roku aimage SB{offset-adjust:-8}
 
+# Boot ROM images for Sun/Cobalt Linux server appliances
+0       string	Cobalt\ Networks\ Inc.\nFirmware\ v	Paged Sun/COBALT boot rom,
+>38     string	x        				version: "%.4s"
+