libgit2: update to version 0.26.1

Use cmake 1.1 portgroup.

devel/libgit2/Portfile

@@ -2,14 +2,11 @@
 
 PortSystem          1.0
 PortGroup           github 1.0
-PortGroup           cmake 1.0
-
-cmake.out_of_source yes
+PortGroup           cmake 1.1
 
 # don't forget to update py-pygit2 and libgit2-glib as well
-github.setup        libgit2 libgit2 0.26.0 v
+github.setup        libgit2 libgit2 0.26.1 v
 epoch               1
-dist_subdir         ${name}/${version}_1
 categories          devel
 platforms           darwin
 maintainers         {devans @dbevans}
@@ -25,8 +22,9 @@ long_description    libgit2 is a portable, pure C implementation of the \
 
 homepage            http://libgit2.github.com/
 
-checksums           rmd160  16b2041b29558c7d824e54b894e8600b81c5b2e5 \
-                    sha256  4c046ce48f8dd5ca45cff2b85101b9ae0111d183780a630ce9579bd925206f49
+checksums           rmd160  0a13f20548f858184f77871c94424fee2b87db31 \
+                    sha256  f5a2532fdad838e4adb264b870405ad8c46eacd1937eeca5dcec060eb1133c02 \
+                    size    4708841
 
 depends_build-append \
                     port:pkgconfig