Example CMake build for Skia.

This works only on Mac, probably only on 64-bit,
and doesn't support SkCodec.

BUG=skia:4269

Review URL: https://codereview.chromium.org/1319543003
diff --git a/cmake/.gitignore b/cmake/.gitignore
new file mode 100644
index 0000000..8c39254
--- /dev/null
+++ b/cmake/.gitignore
@@ -0,0 +1,11 @@
+*.swp
+
+*.ninja
+.ninja*
+CMakeCache.txt
+CMakeFiles
+cmake_install.cmake
+
+libskia.dylib
+example
+example.png