Update libjpeg-turbo with security fixes from upstream

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index 5369764591e7599517f60bd34d1c9dd769b91d63..76cebe12c6b25ae0184aa85f1fe7f551a2abcc6b 100644
--- a/DEPS
+++ b/DEPS
@@ -24,7 +24,7 @@ deps = {
   "third_party/externals/dng_sdk" : "https://android.googlesource.com/platform/external/dng_sdk.git@55625cf05f4345dcab5d9d92b83bb8b5606debab",
   "third_party/externals/piex"    : "https://android.googlesource.com/platform/external/piex.git@883a1e5419990f51b8e928969e9c5a09869bce0e",
 
-  "third_party/externals/libjpeg-turbo"             : "https://skia.googlesource.com/third_party/libjpeg-turbo.git@7bf1a3c9b06bede89cec37cec0b5085c0d6d6c13",
+  "third_party/externals/libjpeg-turbo"             : "https://skia.googlesource.com/third_party/libjpeg-turbo.git@b38b934d246fca482eb6801f4ce79422954a635e",
   # libjpeg-turbo depends on yasm to compile .asm files
   "third_party/externals/yasm/source/patched-yasm/" : "https://chromium.googlesource.com/chromium/deps/yasm/patched-yasm.git@4671120cd8558ce62ee8672ebf3eb6f5216f909b",
   "third_party/externals/yasm/binaries"             : "https://chromium.googlesource.com/chromium/deps/yasm/binaries.git@52f9b3f4b0aa06da24ef8b123058bb61ee468881",