docs/ide-support.md: Add Makefile.ide to odd file types
TEST=none
BRANCH=none
@@ -14,6 +14,7 @@ Patterns | Vague Type
----------------------------------------------------- | ----------
`README.*` | Text
`Makefile.rules`, `Makefile.toolchain` | Makefile
+`Makefile.ide` | Makefile
`gpio.wrap` | C Header
`gpio.inc` | C Header
`*.tasklist`, `*.irqlist`, `*.mocklist`, `*.testlist` | C Header
