Added link to compilation issues for arduino as esp-idf component (#1435)

docs/esp-idf_component.md

@@ -68,3 +68,6 @@ If you are writing code that does not require Arduino to compile and you want yo
 #endif
 ```
 
+## Compilation Errors
+
+As commits are made to esp-idf and submodules, the codebases can develop incompatibilities which cause compilation errors.  If you have problems compiling, follow the instructions in [Issue #1142](https://github.com/espressif/arduino-esp32/issues/1142) to roll esp-idf back to a known good version.