scripts/ld-version.sh: regular expression compile fails

ld --version | scripts/ld-version.sh
fails with
awk: scripts/ld-version.sh:
line 4: regular expression compile failed (missing '(')
.*)

So let's refresh the script from Linux kernel v4.14-rc8.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

scripts/ld-version.sh

 #!/usr/bin/awk -f
+# SPDX-License-Identifier: GPL-2.0
 # extract linker version number from stdin and turn into single number
 	{
-	gsub(".*)", "");
+	gsub(".*\\)", "");
+	gsub(".*version ", "");
+	gsub("-.*", "");
 	split($1,a, ".");
-	print a[1]*10000000 + a[2]*100000 + a[3]*10000 + a[4]*100 + a[5];
+	print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
 	exit
 	}