Merge pull request #3545 from gdh1995/relative-path-for-soft-links

use relative paths on making build/tools/ links

Author: jeffdonahue

Makefile

@@ -601,7 +601,7 @@ $(TEST_CXX_BINS): $(TEST_BIN_DIR)/%.testbin: $(TEST_CXX_BUILD_DIR)/%.o \
 # Target for extension-less symlinks to tool binaries with extension '*.bin'.
 $(TOOL_BUILD_DIR)/%: $(TOOL_BUILD_DIR)/%.bin | $(TOOL_BUILD_DIR)
 	@ $(RM) $@
-	@ ln -s $(abspath $<) $@
+	@ ln -s $(notdir $<) $@
 
 $(TOOL_BINS): %.bin : %.o | $(DYNAMIC_NAME)
 	@ echo CXX/LD -o $@