gn-native: Use UNPACKDIR

whinlatter now requires using UNPACKDIR:

| S should be set relative to UNPACKDIR, e.g. replace
| WORKDIR with UNPACKDIR in "S = ${WORKDIR}/chromium-${PV}"

Signed-off-by: Zoltán Böszörményi <[email protected]>

Author: zboszor

meta-chromium/recipes-browser/chromium/gn-native_136.0.7103.113.bb

@@ -6,7 +6,7 @@ require chromium.inc
 
 inherit native
 
-S = "${WORKDIR}/chromium-${PV}"
+S = "${UNPACKDIR}/chromium-${PV}"
 
 # bootstrap.py --no_clean hardcodes the build location to out_bootstrap.
 # Omitting --no_clean causes the script to create a temporary directory with a