Fix typo in SimplifyCFG.cpp
Fix typo in SimplifyCFG.cpp

<code>egdes</code> -> <code>edges</code>
<code>modifed</code> -> <code>modified</code>
<code>conains</code> -> <code>contains</code>
<code>opportuntities</code> -> <code>opportunities</code>
<code>guarantueed</code> -> <code>guaranteed</code>
<code>paramter</code> -> <code>parameter</code>
<code>sinlge</code> -> <code>single</code>
<code>benefitial</code> -> <code>beneficial</code>
khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift