build: drop ABI version from metadata

Preparation for supporting dynamic ABI versions that depend on the runtime
configuration. Read the suffix from the staging dir pkginfo version files.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

include/package-dumpinfo.mk

@@ -21,8 +21,7 @@ $(if $(MENU),Menu: $(MENU)
 )$(if $(DEFAULT),Default: $(DEFAULT)
 )$(if $(findstring $(PREREQ_CHECK),1),Prereq-Check: 1
 )Version: $(VERSION)
-$(if $(ABI_VERSION),ABIVersion: $(ABI_VERSION)
-)Depends: $(call PKG_FIXUP_DEPENDS,$(1),$(DEPENDS))
+Depends: $(call PKG_FIXUP_DEPENDS,$(1),$(DEPENDS))
 Conflicts: $(CONFLICTS)
 Menu-Depends: $(MDEPENDS)
 Provides: $(PROVIDES)