unrar: fix compiling

packages/addons/addon-depends/system-tools-depends/unrar/package.mk

@@ -28,6 +28,7 @@ PKG_DEPENDS_TARGET="toolchain"
 PKG_SECTION="tools"
 PKG_SHORTDESC="unrar: Extract, test and view RAR archives"
 PKG_LONGDESC="Unrar is a package to handle files compressed in the RAR format. Due to strange licensing issues this package can only view, test and extract files in a given archive, but not pack files. But since we have far more advanced open-source compression utils it should be enough to extract the content when you get a RAR archive."
+PKG_TOOLCHAIN="manual"
 
 make_target() {
   make CXX="$CXX" \
@@ -37,7 +38,3 @@ make_target() {
      STRIP="$STRIP" \
      -f makefile
 }
-
-makeinstall_target() {
-  : # nop
-}