libvorbisidec: Add pkgconfig to STAGING_DIR

Signed-off-by: Ted Hess <thess@kitschensync.net>

libs/libvorbisidec/Makefile

@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=libvorbisidec
 PKG_REV:=20150104
 PKG_VERSION:=1.0.3-$(PKG_REV)
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://git.xiph.org/tremor.git
@@ -51,6 +51,8 @@ define Build/InstallDev
 	$(CP) $(PKG_INSTALL_DIR)/usr/include/tremor $(1)/usr/include/
 	$(INSTALL_DIR) $(1)/usr/lib
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libvorbisidec.{a,so*} $(1)/usr/lib/
+	$(INSTALL_DIR) $(1)/usr/lib/pkgconfig/
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/pkgconfig/* $(1)/usr/lib/pkgconfig/
 endef
 
 define Package/libvorbisidec/install