8046451: Add basic IntelliJ support for langtools
Summary: Add new ant target 'idea' to create IntelliJ langtools project
Reviewed-by: jjg
<component name="InspectionProjectProfileManager">
<settings>
<option name="PROJECT_PROFILE" value="langtools" />
<option name="USE_PROJECT_PROFILE" value="true" />
<version value="1.0" />
</settings>
</component>