add new modified bossac for Linux and OS X

Author: NT7S

arduino/bossac-1.7.0-etherkit-1-i386-apple-darwin11.zip

@@ -55,6 +55,31 @@
         }
       ],
       "tools": [
+				"name": "bossac",
+				"version": "1.7.0-etherkit-1",
+				"systems": [
+				{
+					"host": "i686-pc-linux-gnu",
+					"url": "https://github.com/etherkit/etherkit.github.io/raw/master/arduino/bossac-1.7.0-etherkit-1-i686-linux-gnu.zip",
+					"archiveFileName": "bossac-1.7.0-etherkit-1-i686-linux-gnu.zip",
+					"checksum": "SHA-256:17ca177a6a16aabdf3443dbfbb90fcbda02f6cac866b05aec537b455dbcf6542",
+					"size": "32028"
+				},
+				{
+					"host": "x86_64-pc-linux-gnu",
+					"url": "https://github.com/etherkit/etherkit.github.io/raw/master/arduino/bossac-1.7.0-etherkit-1-x86_64-linux-gnu.zip",
+					"archiveFileName": "bossac-1.7.0-etherkit-1-x86_64-linux-gnu.zip",
+					"checksum": "SHA-256:4048b56a226faecac3cf4d751eef602c7f1b179831add569287a35f877895050",
+					"size": "30543"
+				},
+				{
+					"host": "i386-apple-darwin11",
+					"url": "https://github.com/etherkit/etherkit.github.io/raw/master/arduino/bossac-1.7.0-etherkit-1-i386-apple-darwin11.zip",
+					"archiveFileName": "bossac-1.7.0-etherkit-1-i386-apple-darwin11.zip",
+					"checksum": "SHA-256:baa172db2b6ba884268c51904e522df6218fde7634db4b51f844cd8b3139cf11",
+					"size": "80011"
+				}
+				]
       ]
     }
   ]