Hack around change to clang -print-runtime-dir

`clang -print-runtime-dir` reports a non-existent directory as we build with `LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF`. See llvm/llvm-project#102834. I suspect llvm/llvm-project@b6a1473 caused the change by chaning the code in Driver.cpp to not check whether the printed directory existed.

deps/sanitizers.mk

@@ -1,18 +1,19 @@
 # Interrogate the compiler about where it is keeping its sanitizer libraries
 ifeq ($(USECLANG),1)
-SANITIZER_LIB_PATH := $(shell LANG=C $(CC) -print-runtime-dir)
+SANITIZER_LIB_PATH := $(shell LANG=C $(CC) -print-runtime-dir)\:$(subst $(eval ) ,:,$(abspath $(wildcard $(shell LANG=C $(CC) -print-resource-dir)/lib/*/)))
 else
 SANITIZER_LIB_PATH := $(dir $(shell LANG=C $(CC) -print-file-name=libasan.so))
 endif
 
 # Given a colon-separated list of paths in $(2), find the location of the library given in $(1)
 define pathsearch_all
-$(wildcard $(addsuffix /$(1),$(subst :, ,$(2))))
+$(eval _result := $(firstword $(wildcard $(addsuffix /$(1),$(subst :, ,$(2))))))
+$(if $(_result),$(_result),$(error No matches found for '$(1)' in $(2)))
 endef
 
 define copy_sanitizer_lib
 install-sanitizers: $$(addprefix $$(build_libdir)/, $$(notdir $$(call pathsearch_all,$(1),$$(SANITIZER_LIB_PATH)))) | $$(build_shlibdir)
-$$(addprefix $$(build_shlibdir)/,$(2)): $$(addprefix $$(SANITIZER_LIB_PATH)/,$(2)) | $$(build_shlibdir)
+$$(addprefix $$(build_shlibdir)/,$(2)): $$(addprefix $$(dir $$(call pathsearch_all,$(1),$$(SANITIZER_LIB_PATH))),$(2)) | $$(build_shlibdir)
 	-cp $$< $$@
 	$(if $(filter $(OS), Linux), \
 		  -$(PATCHELF) $(PATCHELF_SET_RPATH_ARG) '$$$$ORIGIN' $$@ , 0)