Fix bazel version for debian package

0.1.3 was transformed into 0.1.~3 instead of 0.1.3
Tested the regexp manually with:
echo 0.1.3 | sed ...
echo 0.1.3rc3 | sed ...

--
MOS_MIGRATED_REVID=111884245
diff --git a/scripts/packages/BUILD b/scripts/packages/BUILD
index 15b39c4..71a8e63 100644
--- a/scripts/packages/BUILD
+++ b/scripts/packages/BUILD
@@ -146,7 +146,11 @@
         "find . -name stable-status.txt -exec cat '{}' ';'" +
         " | grep EMBED_LABEL | cut -d ' ' -f 2-" +
         # Debian package manager does not order our rcs correctly, insert a tilde
-        " | sed -E 's/^([0-9\\.]+)(.+)$$/\\1~\\2/'" +
+        # Non RC version number are not matched by the regex, example translations:
+        # 0.1.2         0.1.2
+        # 0.1.2rc2      0.1.2~rc2
+        # 0.1.2rc2-jdk7 0.1.2~rc2-jdk7
+        " | sed -E 's/^([0-9\\.]+)([^0-9\\.].*)$$/\\1~\\2/'" +
         " > $@\n",
     stamp = 1,
 )