Ignore the case when RUBY_ENGINE is undefined
Ignore the case when RUBY_ENGINE is undefined

This happened on MRI 1.8 which we no longer support

chrisblock/selenium,valfirst/selenium,titusfortner/selenium,chrisblock/selenium,SeleniumHQ/selenium,joshmgrant/selenium,titusfortner/selenium,HtmlUnit/selenium,joshmgrant/selenium,joshbruning/selenium,Ardesco/selenium,HtmlUnit/selenium,asolntsev/selenium,lmtierney/selenium,Ardesco/selenium,oddui/selenium,Ardesco/selenium,oddui/selenium,valfirst/selenium,valfirst/selenium,titusfortner/selenium,lmtierney/selenium,lmtierney/selenium,oddui/selenium,Dude-X/selenium,SeleniumHQ/selenium,Dude-X/selenium,asolntsev/selenium,Dude-X/selenium,titusfortner/selenium,HtmlUnit/selenium,lmtierney/selenium,asolntsev/selenium,joshbruning/selenium,valfirst/selenium,joshbruning/selenium,joshbruning/selenium,chrisblock/selenium,chrisblock/selenium,SeleniumHQ/selenium,titusfortner/selenium,SeleniumHQ/selenium,HtmlUnit/selenium,asolntsev/selenium,Dude-X/selenium,titusfortner/selenium,valfirst/selenium,HtmlUnit/selenium,chrisblock/selenium,SeleniumHQ/selenium,Dude-X/selenium,valfirst/selenium,lmtierney/selenium,HtmlUnit/selenium,asolntsev/selenium,joshbruning/selenium,joshmgrant/selenium,HtmlUnit/selenium,oddui/selenium,chrisblock/selenium,Dude-X/selenium,lmtierney/selenium,SeleniumHQ/selenium,joshbruning/selenium,SeleniumHQ/selenium,SeleniumHQ/selenium,HtmlUnit/selenium,asolntsev/selenium,Dude-X/selenium,joshmgrant/selenium,valfirst/selenium,asolntsev/selenium,oddui/selenium,asolntsev/selenium,oddui/selenium,joshmgrant/selenium,valfirst/selenium,SeleniumHQ/selenium,Ardesco/selenium,titusfortner/selenium,Dude-X/selenium,Ardesco/selenium,Ardesco/selenium,valfirst/selenium,Dude-X/selenium,joshbruning/selenium,joshbruning/selenium,asolntsev/selenium,lmtierney/selenium,oddui/selenium,joshbruning/selenium,oddui/selenium,chrisblock/selenium,titusfortner/selenium,valfirst/selenium,joshmgrant/selenium,joshmgrant/selenium,lmtierney/selenium,titusfortner/selenium,HtmlUnit/selenium,oddui/selenium,joshmgrant/selenium,Ardesco/selenium,SeleniumHQ/selenium,Ardesco/selenium,joshmgrant/selenium,joshmgrant/selenium,chrisblock/selenium,titusfortner/selenium,joshmgrant/selenium,Ardesco/selenium,chrisblock/selenium,valfirst/selenium,SeleniumHQ/selenium,lmtierney/selenium,titusfortner/selenium,HtmlUnit/selenium