Fix build issues.

src/OpenGL/compiler/ParseHelper.cpp

@@ -14,6 +14,7 @@
 
 #include "ParseHelper.h"
 
+#include <limits>
 #include <stdarg.h>
 #include <stdio.h>
 

src/OpenGL/compiler/preprocessor/ExpressionParser.cpp

@@ -105,6 +105,7 @@
 #include <stdlib.h>
 #endif
 
+#include <limits>
 #include <cassert>
 #include <sstream>
 #include <stdint.h>

src/OpenGL/compiler/preprocessor/ExpressionParser.y

@@ -55,6 +55,7 @@ WHICH GENERATES THE GLSL ES preprocessor expression parser.
 #include <stdlib.h>
 #endif
 
+#include <limits>
 #include <cassert>
 #include <sstream>
 #include <stdint.h>

src/OpenGL/libGLESv2/Program.cpp

@@ -1665,7 +1665,7 @@ namespace es2
 			return attribute.location;
 		}
 
-		std::unordered_map<std::string, GLuint>::const_iterator it = linkedAttributeLocation.find(attribute.name);
+		std::map<std::string, GLuint>::const_iterator it = linkedAttributeLocation.find(attribute.name);
 		if(it != linkedAttributeLocation.end())
 		{
 			return it->second;