serf: do not install the static library

scons is using host ar to create it, which may or may not
be built with reproducible option by default. Rather than
patch scons for the benefit of a single recipe, let's
just not install the .a, which is unused anyway.

(From OE-Core rev: 7e44275f4d286f005b2f19e3dcc9c6d390b98f30)

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

meta/recipes-support/serf/serf_1.3.9.bb

@@ -30,4 +30,9 @@ EXTRA_OESCONS = " \
                   OPENSSL="${STAGING_EXECPREFIXDIR}" \
                   "
 
+# scons creates non-reproducible archives
+do_install_append() {
+	rm ${D}/${libdir}/*.a
+}
+
 BBCLASSEXTEND = "native nativesdk"