[Buildroot] [git commit branch/2018.02.x] package/libid3tag: fix id3tag.pc

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=9cc0edf2e38be4a303e0ff0a101a208f9c151fc3
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2018.02.x

Add -lz to id3tag.pc, this fix is needed to be able to use pkg-config in
madplay to find id3tag dependencies

Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
(cherry picked from commit aa813cd9ac029a8373070ac2c1479dd9aa32ce59)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 package/libid3tag/id3tag.pc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/libid3tag/id3tag.pc b/package/libid3tag/id3tag.pc
index 845eb3276b..63d09eee8b 100644
--- a/package/libid3tag/id3tag.pc
+++ b/package/libid3tag/id3tag.pc
@@ -8,4 +8,5 @@ Description: ID3 tag reading library
 Version: 0.15.1b
 Requires:
 Libs: -L${libdir} -lid3tag
+Libs.private: -lz
 Cflags: -I${includedir}