Create resources/.gitignore file.

Create a .gitignore file in resources/ that is responsible for
preventing the downloaded binary files from being added to source control.

BUG=None
NOTRY=True

Review-Url: https://codereview.webrtc.org/2587163002
Cr-Commit-Position: refs/heads/master@{#15691}

Author: kjellander

Diff for: .gitignore

@@ -49,27 +49,6 @@
 /links.db
 /mojo
 /out
-/resources/**/*.aecdump
-/resources/**/*.bin
-/resources/**/*.byte
-/resources/**/*.chn
-/resources/**/*.dat
-/resources/**/*.frames
-/resources/**/*.gai
-/resources/**/*.jpg
-/resources/**/*.pb
-/resources/**/*.pcap
-/resources/**/*.pcm
-/resources/**/*.rtp
-/resources/**/*.rtpdump
-/resources/**/*.rx
-/resources/**/*.txt
-/resources/**/*.wav
-/resources/**/*.y4m
-/resources/**/*.yuv
-/resources/**/*.BIT*
-/resources/**/*.INP
-/resources/**/*.OUT*
 /testing
 /third_party/BUILD.gn
 /third_party/WebKit

Diff for: resources/.gitignore

@@ -0,0 +1,21 @@
+**/*.aecdump
+**/*.bin
+**/*.byte
+**/*.chn
+**/*.dat
+**/*.frames
+**/*.gai
+**/*.jpg
+**/*.pb
+**/*.pcap
+**/*.pcm
+**/*.rtp
+**/*.rtpdump
+**/*.rx
+**/*.txt
+**/*.wav
+**/*.y4m
+**/*.yuv
+**/*.BIT*
+**/*.INP
+**/*.OUT*