build: Update glslang commit ID in known-good.json

Updated the glslang commig ID in `known-good.json` to:
`bfe4c5957fc51148a0aab6e04bb22020667c1092`

Change-Id: I8eb0009be4ee1a3145d908b2659d7b9459aa45d5
diff --git a/scripts/known_good.json b/scripts/known_good.json
index d9b808c..0cc0e9c 100644
--- a/scripts/known_good.json
+++ b/scripts/known_good.json
@@ -6,7 +6,7 @@
       "sub_dir" : "glslang",
       "build_dir" : "glslang/build",
       "install_dir" : "glslang/build/install",
-      "commit" : "4fc7a33910fb8e40b970d160e1b38ab3f67fe0f3",
+      "commit" : "bfe4c5957fc51148a0aab6e04bb22020667c1092",
       "prebuild" : [
         "python update_glslang_sources.py"
       ]