We installed libgit2, so now let's use it

.travis.yml

@@ -32,7 +32,7 @@ before_install:
         brew install -v --only-dependencies --HEAD julia;
         BUILDOPTS="USECLANG=1 LLVM_CONFIG=$(brew --prefix llvm33-julia)/bin/llvm-config-3.3 VERBOSE=1 USE_BLAS64=0 SUITESPARSE_INC=-I$(brew --prefix suite-sparse-julia)/include";
         BUILDOPTS="$BUILDOPTS LIBBLAS=-lopenblas LIBBLASNAME=libopenblas LIBLAPACK=-lopenblas LIBLAPACKNAME=libopenblas";
-        for lib in LLVM ZLIB SUITESPARSE ARPACK BLAS FFTW LAPACK GMP MPFR PCRE LIBUNWIND; do
+        for lib in LLVM ZLIB SUITESPARSE ARPACK BLAS FFTW LAPACK GMP MPFR PCRE LIBUNWIND LIBGIT2; do
             export BUILDOPTS="$BUILDOPTS USE_SYSTEM_$lib=1";
         done;
         export LDFLAGS="-L$(brew --prefix openblas-julia)/lib -L$(brew --prefix suite-sparse-julia)/lib";