Adding Interface Blocks to glsl parser

Added code to parse interface blocks and the
corresponding layout qualifiers to the glsl parser.

Change-Id: Idfcbf08f3f877ea9641ae611e6bddd2be1ffb952
Reviewed-on: https://swiftshader-review.googlesource.com/3480
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

src/OpenGL/compiler/ParseHelper.h

diff --git a/src/OpenGL/compiler/ParseHelper.h b/src/OpenGL/compiler/ParseHelper.h
index cac1647..fa31481 100644
--- a/src/OpenGL/compiler/ParseHelper.h
+++ b/src/OpenGL/compiler/ParseHelper.h
@@ -160,6 +160,7 @@
 	                                           const TString &identifier, const TSourceLoc &indexLocation, TIntermTyped *indexExpression,
                                                const TSourceLoc &initLocation, TIntermTyped *initializer);
 
+    void parseGlobalLayoutQualifier(const TPublicType &typeQualifier);
     TIntermTyped* addConstructor(TIntermNode*, const TType*, TOperator, TFunction*, TSourceLoc);
     TIntermTyped* foldConstConstructor(TIntermAggregate* aggrNode, const TType& type);
     TIntermTyped* addConstVectorNode(TVectorFields&, TIntermTyped*, TSourceLoc);
@@ -172,6 +173,9 @@
     TFieldList *addStructDeclaratorList(const TPublicType &typeSpecifier, TFieldList *fieldList);
     TPublicType addStructure(const TSourceLoc &structLine, const TSourceLoc &nameLine, const TString *structName, TFieldList *fieldList);
 
+    TIntermAggregate* addInterfaceBlock(const TPublicType& typeQualifier, const TSourceLoc& nameLine, const TString& blockName, TFieldList* fieldList,
+                                        const TString* instanceName, const TSourceLoc& instanceLine, TIntermTyped* arrayIndex, const TSourceLoc& arrayIndexLine);
+
     TLayoutQualifier parseLayoutQualifier(const TString &qualifierType, const TSourceLoc& qualifierTypeLine);
     TLayoutQualifier parseLayoutQualifier(const TString &qualifierType, const TSourceLoc& qualifierTypeLine, const TString &intValueString, int intValue, const TSourceLoc& intValueLine);
     TLayoutQualifier joinLayoutQualifiers(TLayoutQualifier leftQualifier, TLayoutQualifier rightQualifier);