fix github languages, no C++ here

Author: mulle-nat

.gitattributes

@@ -0,0 +1,15 @@
+# ### > generated by mulle-sde (extensions/mulle-sde/sde/init)
+# Tweak GitHub language statistics
+
+# .inc is generally C
+
+*.h         linguist-language=C
+*.inc       linguist-language=C
+
+# remove boring files
+.mulle/**   linguist-generated
+.vscode/**  linguist-generated
+cmake/**    linguist-generated
+
+# ### < generated by mulle-sde (extensions/mulle-sde/sde/init)
+