libfile-slurper-perl: fix ptests

Install missing test file.

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>

meta-perl/recipes-perl/libfile/libfile-slurper-perl_0.013.bb

@@ -30,6 +30,11 @@ RDEPENDS:${PN}-ptest += "libtest-warnings-perl \
 
 S = "${WORKDIR}/File-Slurper-${PV}"
 
+do_install_ptest:append(){
+    install -d ${D}${PTEST_PATH}/lib
+    touch ${D}${PTEST_PATH}/lib/File
+}
+
 inherit cpan ptest-perl
 
 BBCLASSEXTEND = "native"