gawk: fix failing ptests

They were failing due to incorrect locale being used.

(From OE-Core rev: c4fdb3a8629c0c230e430a60df850f9c5ed4a423)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/gawk/gawk_5.0.1.bb

@@ -46,6 +46,8 @@ do_install_ptest() {
 	done
 	sed -i -e 's|/usr/local/bin|${bindir}|g' \
 	    -e 's|#!${base_bindir}/awk|#!${bindir}/awk|g' ${D}${PTEST_PATH}/test/*.awk
+
+        sed -i -e "s|GAWKLOCALE|LANG|g" ${D}${PTEST_PATH}/test/Maketests
 }
 
 RDEPENDS_${PN}-ptest += "make"