Make commit-date pattern more specific in test for issue 107094

Author: duckymirror

tests/run-make/issue-107094/Makefile

@@ -3,5 +3,5 @@
 include ../tools.mk
 
 all:
-	$(BARE_RUSTC) --version --verbose | $(CGREP) -i -e "commit-hash: [0-9a-f]{40}" "commit-date: [0-9\-]+"
-	$(BARE_RUSTDOC) --version --verbose | $(CGREP) -i -e "commit-hash: [0-9a-f]{40}" "commit-date: [0-9\-]+"
+	$(BARE_RUSTC) --version --verbose | $(CGREP) -i -e "commit-hash: [0-9a-f]{40}" "commit-date: [0-9]{4}-[0-9]{2}-[0-9]{2}"
+	$(BARE_RUSTDOC) --version --verbose | $(CGREP) -i -e "commit-hash: [0-9a-f]{40}" "commit-date: [0-9]{4}-[0-9]{2}-[0-9]{2}"