Add api-report Makefile target

Author: davidmalcolm

Makefile

@@ -123,6 +123,10 @@ endif
 
 all: autogenerated-config.h testcpybuilder test-suite testcpychecker
 
+# What still needs to be wrapped?
+api-report:
+	grep -nH -e "\.inner" gcc-*.c *.h generate-*.py
+
 plugin: autogenerated-config.h $(PLUGIN_DSO)
 
 # When running the plugin from a working copy, use LD_LIBARY_PATH=gcc-c-api