libical: Work around hardcoded paths in pkgconfig file

For now, work around the hardcoded path in the pkgconfig file.
Issue filed upstream as:

https://github.com/libical/libical/issues/227

This raises questions about whether some sanity tests are running.
Those issues will be addressed in a separate patch.

(From OE-Core rev: 1b2e1eb6f08b6f95cf555d7f6bc6e4de2113aaed)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/libical/libical_2.0.0.bb

@@ -18,3 +18,10 @@ UPSTREAM_CHECK_URI = "https://github.com/libical/libical/releases"
 inherit cmake
 
 FILES_${PN}-dev += "${libdir}/cmake/*"
+
+#
+# Turn specific library paths in the pkgconfig file into standard library entries
+#
+do_install_append () {
+	sed -i -e "s#${STAGING_LIBDIR}/lib\([a-z0-9]*\)\.so#-l\1#g" ${D}${libdir}/pkgconfig/libical.pc
+}