Compiling libgit2 should be a pre-requisite of the rugged binary.
Compiling libgit2 should be a pre-requisite of the rugged binary.

Previously, the libgit2 binary would not be built when calling the
`rake cross native gem` tasks.

libgit2/rugged,saraid/rugged,saraid/rugged,Acidburn0zzz/rugged,tpickett66/rugged,saraid/rugged,libgit2/rugged,tpickett66/rugged,tpickett66/rugged,Acidburn0zzz/rugged,Acidburn0zzz/rugged,libgit2/rugged