Make includeStandardDefines configurable

[micheljung]

If I understood #264 correctly, it was always generated before and now it's only if there is actually e.g. a postInstall script defined.

In our case, scripts like postInstall need to be approved by QA. Once the script changes, it needs to be approved again. Since RPM_PACKAGE_RELEASE and RPM_PACKAGE_VERSION change with every build, this is obviously bad.

If includeStandardDefines was configurable, this would be easy to solve:

gradle-ospackage-plugin/src/main/groovy/com/netflix/gradle/plugins/rpm/RpmCopyAction.groovy

Lines 248 to 254 in 37c76db

	result = includeStandardDefines ?
	String.format(" RPM_ARCH=%s \n RPM_OS=%s \n RPM_PACKAGE_NAME=%s \n RPM_PACKAGE_VERSION=%s \n RPM_PACKAGE_RELEASE=%s \n\n",
	task.getArchString(),
	task.os?.toString()?.toLowerCase() ?: '',
	task.getPackageName(),
	task.getVersion(),
	task.getRelease()) : null