_variables.scss: reorder SVG attributes
_variables.scss: reorder SVG attributes

This results in slightly better gzip compression

inway/bootstrap,GerHobbelt/bootstrap,tjkohli/bootstrap,inway/bootstrap,m5o/bootstrap,twbs/bootstrap,m5o/bootstrap,coliff/bootstrap,tjkohli/bootstrap,coliff/bootstrap,inway/bootstrap,GerHobbelt/bootstrap,GerHobbelt/bootstrap,twbs/bootstrap