Add SHA1 checksum check on the binary download

packages/gdrive.rb

@@ -13,16 +13,23 @@ class Gdrive < Package
     case ARCH
     when 'x86_64'
       system "wget -L -O #{CREW_DEST_DIR}/usr/local/bin/gdrive https://docs.google.com/uc?id=0B3X9GlR6EmbnQ0FtZmJJUXEyRTA&export=download"
+      system "sleep 10"
+      abort 'Checksum mismatch. :/ Try again.'.lightred unless Digest::SHA1.hexdigest( File.read("#{CREW_DEST_DIR}/usr/local/bin/gdrive") ) == '4fd8391b300cac45963e53da44dcfe68da08d843'
     when 'armv7l'
       system "wget -L -O #{CREW_DEST_DIR}/usr/local/bin/gdrive https://docs.google.com/uc?id=0B3X9GlR6EmbnamliN0Rld01oRVk&export=download"
+      system "sleep 10"
+      abort 'Checksum mismatch. :/ Try again.'.lightred unless Digest::SHA1.hexdigest( File.read("#{CREW_DEST_DIR}/usr/local/bin/gdrive") ) == '3d670905e13edf96d43c9f97293bdba62c740926'
     when 'mips64'
       system "wget -L -O #{CREW_DEST_DIR}/usr/local/bin/gdrive https://docs.google.com/uc?id=0B3X9GlR6Embna2lzdEJ6blFzSzQ&export=download"
+      system "sleep 10"
+      abort 'Checksum mismatch. :/ Try again.'.lightred unless Digest::SHA1.hexdigest( File.read("#{CREW_DEST_DIR}/usr/local/bin/gdrive") ) == '334bbd74b87fd1d05550e366724fe8e3c9e61ca4'
     when 'ppc64'
       system "wget -L -O #{CREW_DEST_DIR}/usr/local/bin/gdrive https://docs.google.com/uc?id=0B3X9GlR6EmbnS09XMzhfRXBnUzA&export=download"
+      system "sleep 10"
+      abort 'Checksum mismatch. :/ Try again.'.lightred unless Digest::SHA1.hexdigest( File.read("#{CREW_DEST_DIR}/usr/local/bin/gdrive") ) == '70a1ac5be9ba819da5cf7a8dbd513805a26509ac'
     else
       abort 'Unable to install gdrive.  Architecture not supported.'.lightred
     end
-    system "sleep 10"
     system "chmod +x #{CREW_DEST_DIR}/usr/local/bin/gdrive"
   end
 end