jansson: revert ABI version bump

The soversion of the shipped libjansson.so library didn't change, so the
ABI version change is unwarranted and leads to opkg file clashes.

Also stop shipping an unversioned library symlink while we're at it as
it only needed at compile/link time and leading to file level clashes
between packages on future ABI bumps.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

package/libs/jansson/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=jansson
 PKG_VERSION:=2.14
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/akheron/$(PKG_NAME)/tar.gz/v$(PKG_VERSION)?
@@ -33,7 +33,7 @@ define Package/jansson
   CATEGORY:=Libraries
   TITLE:=Jansson library
   URL:=http://www.digip.org/jansson/
-  ABI_VERSION:=5
+  ABI_VERSION:=4
 endef
 
 define Package/jansson/description
@@ -45,7 +45,7 @@ TARGET_LDFLAGS += -flto
 
 define Package/jansson/install
 	$(INSTALL_DIR) $(1)/usr/lib
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libjansson*so* $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libjansson*so.* $(1)/usr/lib/
 endef
 
 $(eval $(call BuildPackage,jansson))