Fixed package name for generic (#168)

Author: Shinji-IkariG

build.sh

@@ -262,7 +262,11 @@ done
 # Remove CMake configs of boost
 rm -rf $install_dir/lib/cmake/[Bb]oost*
 
-march=${isa:-$(uname -m)}
+if [[ $isa == "generic" ]]; then
+    march=$(uname -m)
+else
+    march=$isa
+fi
 
 cat > $install_dir/version-info <<EOF
 Package         : Nebula Third Party