GENSER-build-machines.md

 GENSER has the following build machines for old platforms: 
 
-1. genser-slc5-i686-2  for i686-slc5   - virtual - created by Ivan
+1. genser-slc5-i686-4  for i686-slc5   - virtual - created by Ivan
 2. ec-slc6-i686-spi-1  for i686-slc6 - SFT-SPI machine
 3. genser-slc5-x8664     for x86-64-slc5  - virtual - created by Grigory