setlocalversion: remove '-dirty' suffix for uncommitted changes in git and mercurial

Author: Loukious

scripts/setlocalversion

@@ -94,7 +94,7 @@ scm_version()
 			git --no-optional-locks status -uno --porcelain 2>/dev/null ||
 			git diff-index --name-only HEAD
 		} | grep -qvE '^(.. )?scripts/package'; then
-			printf '%s' -dirty
+			printf '%s' ''
 		fi
 
 		# All done with git
@@ -118,7 +118,7 @@ scm_version()
 		# Are there uncommitted changes?
 		# These are represented by + after the changeset id.
 		case "$hgid" in
-			*+|*+\ *) printf '%s' -dirty ;;
+			*+|*+\ *) printf '%s' '' ;;
 		esac
 
 		# All done with mercurial