README: add missing fiptool

We have been supporting fiptool for a while, but failed to document that it's possible to override the path to it. Remedy that. Signed-off-by: Ahmad Fatoum <[email protected]>
pengutronix · Apr 3, 2024 · 572e01e · 572e01e
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commit 572e01e
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diff --git a/README.rst b/README.rst
@@ -661,6 +661,7 @@ variable.
 :tar:		path to the tar program (default tar)
 :tune2fs:	path to the tune2fs program (default tune2fs)
 :ubinize:	path to the ubinize program (default ubinize)
+:fiptool:	path to the fiptool utility (default fiptool)
 
 
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