Merge "Don't run find on directories that don't exist"

variant_sfx :=_aux_variant_config.mk

os_sfx :=_aux_os_config.mk

all_configs := $(shell find device vendor -maxdepth 4 -name '*$(variant_sfx)' -o -name '*$(os_sfx)' | sort)

config_roots := $(wildcard device vendor)

all_configs :=

ifdef config_roots

all_configs := $(shell find $(config_roots) -maxdepth 4 -name '*$(variant_sfx)' -o -name '*$(os_sfx)' | sort)

endif

all_os_configs := $(filter %$(os_sfx),$(all_configs))

all_variant_configs := $(filter %$(variant_sfx),$(all_configs))