espeak: fix host-user-contaminated

Fix QA warning:
WARNING: QA Issue: espeak: /espeak/usr/share/espeak-data/mbrola_ph/de6_phtrans is owned by uid 1000,
which is the same as the user running bitbake. This may be due to host contamination [host-user-contaminated]

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-support/espeak/espeak_1.37.bb

@@ -40,4 +40,5 @@ do_install() {
     fi
 
     cp -prf ${S}/espeak-data/* ${D}${datadir}/espeak-data
+    chown -R root:root ${D}${datadir}/espeak-data
 }