Ignore minted.sty.

Change-Id: I2467a6f801812b9007b51bf14b00757f026e4322
diff --git a/.gitignore b/.gitignore
index d8bfb2c..17c8045 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,5 +16,6 @@
 *.synctex.gz
 ceres.pdf
 ceres-solver.pdf
+docs/minted.sty
 obj/
 jni/libs/