Updated core submodule (fixed glslang cmake options)

TheMostDiligent · TheMostDiligent · commit c6f1d812f16e · 2018-07-07T23:45:24.000-07:00
diff --git a/DiligentCore b/DiligentCore
@@ -1 +1 @@
-Subproject commit 855246f6b6c31dc9fa42195c806052f8508bdecc
+Subproject commit 7a4945bddc767e0bbf99f800ccf504fea04d2319
