tiff: don't install cruft

This gets rid of ca. 60 manpages and 60 HTML pages.

The 19 executables that were not built and installed before, continue
not being built/installed.

src/tiff.mk

@@ -21,5 +21,5 @@ define $(PKG)_BUILD
     cd '$(1)' && ./configure \
         $(MXE_CONFIGURE_OPTS) \
         --without-x
-    $(MAKE) -C '$(1)' -j '$(JOBS)' install bin_PROGRAMS= sbin_PROGRAMS= noinst_PROGRAMS=
+    $(MAKE) -C '$(1)' -j '$(JOBS)' install $(MXE_DISABLE_CRUFT)
 endef