Doxyfile.in: Exclude all examples

The source has been reorganized since the doxygen configs
were last updated; there are more examples that should be
excluded, and they're all now under `src/examples/`, so exclude
the entire dir.

Author: ferdnyc

Doxyfile.in

@@ -797,8 +797,7 @@ EXCLUDE_SYMLINKS       = NO
 
 EXCLUDE_PATTERNS       = "*/.*" \
                          "*/.*/*" \
-                         "*/src/Main.cpp*" \
-                         "*/src/Main_Blackmagic.cpp*" \
+                         "*/src/examples/*" \
                          "*/src/bindings/*" \
                          "*.py"