Auto merge of #36445 - infinity0:master, r=brson

mk: add a all-no-docs target to build everything except docs

This makes things slightly more efficient for Debian's auto-builders where the
docs can be built on just one architecture, and distributed to users of all
other architectures as well.

Author: bors

mk/main.mk

@@ -633,7 +633,8 @@ ALL_TARGET_RULES = $(foreach target,$(CFG_TARGET), \
 	$(foreach host,$(CFG_HOST), \
  all-target-$(target)-host-$(host)))
 
-all: $(ALL_TARGET_RULES) $(GENERATED) docs
+all-no-docs: $(ALL_TARGET_RULES) $(GENERATED)
+all: all-no-docs docs
 
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 # Build system documentation