[XPT2046] Add solution items with customary content

***NO_CI***

Author: josesimoes

devices/XPT2046/XPT2046.sln

@@ -9,6 +9,13 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Samples", "Samples", "{02EA
 EndProject
 Project("{11A8DD76-328B-46DF-9F39-F559912D0360}") = "TouchDemo", "samples\TouchDemo.nfproj", "{2D7CDABB-6C2C-4957-8A83-9751C75C0435}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{8EC462FD-D22E-90A8-E5CE-7E832BA40C5D}"
+	ProjectSection(SolutionItems) = preProject
+		README.md = README.md
+		version.json = version.json
+		XPT2046.nuspec = XPT2046.nuspec
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU