popt: update SRC_URI

It appears the rpm5.org has been down for some time, switch to fossies

WARNING: popt-native-1.16-r3 do_fetch: Failed to fetch URL http://rpm5.org/files/popt/popt-1.16.tar.gz, attempting MIRRORS if available

(From OE-Core rev: 347ee336dcc94e6fa4e4788117013615b90abd70)

Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/popt/popt_1.16.bb

@@ -8,7 +8,7 @@ PR = "r3"
 
 DEPENDS = "virtual/libiconv"
 
-SRC_URI = "http://rpm5.org/files/popt/popt-${PV}.tar.gz \
+SRC_URI = "https://fossies.org/linux/misc/popt-${PV}.tar.gz \
            file://pkgconfig_fix.patch \
            file://popt_fix_for_automake-1.12.patch \
            file://disable_tests.patch \