When building using a special Oracle internal tool, the value of the
JMOD_CMD variable has an environment variable assignment added to it
(SOMETHING_FOO=foo /path/to/jmod). This causes the build to break in
jmod creation, because the value of JMOD_CMD is used as a prerequisite
in a rule declaration. This patch adds a wildcard to filter out any non
files from the variable JMOD_CMD before trying to use the value as a
prerequisite.
Bug: https://bugs.openjdk.java.net/browse/JDK-8160334
Webrev: http://cr.openjdk.java.net/~erikj/8160334/webrev.01/
/Erik