Review request: include US_export_policy.jar and local_policy.jar

[Mandy Chung]

Webrev at:
    http://cr.openjdk.java.net/~mchung/jigsaw/export-policy-jars/

The current JCE implementation checks the existence of 
US_export_policy.jar and local_policy.jar and throws exception if not 
exist. A number of security jtreg tests failed due to such failure.

This fix will copy US_export_policy.jar and local_policy.jar in the 
module-image as a short term solution so as to allows more tests to run 
to verify the module-image.  When signed modules are fully supported, 
US_export_policy and local_policy will be converted to signed modules to 
replace these jars in the module-image.

Comparing the number of jdk_security3 failures:
Before the fix: TEST STATS: run=363  pass=226  fail=137  excluded=26
After the fix: TEST STATS: run=363  pass=349  fail=14  excluded=26

Without these 2 policy jars, the exception looks like this:

Caused by: java.lang.SecurityException: Can not initialize cryptographic 
mechanism
        at javax.crypto.JceSecurity.<clinit>(JceSecurity.java:86)
        ... 38 more
Caused by: java.lang.SecurityException: Cannot locate policy or 
framework files!
        at 
javax.crypto.JceSecurity.setupJurisdictionPolicies(JceSecurity.java:254)
        at javax.crypto.JceSecurity.access$000(JceSecurity.java:48)
        at javax.crypto.JceSecurity$1.run(JceSecurity.java:78)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.crypto.JceSecurity.<clinit>(JceSecurity.java:76)

Thanks
Mandy