RFR(XS): 8056056 - Remove unnecessary inclusion of HS_ALT_MAKE from solaris Makefile

[Jesper Wilhelmsson]

Hi,

Looking for reviews for this small fix that removes the unnecessary passing of 
HS_ALT_MAKE to buildtree.make from the Solaris Makefile. It was recently added 
but is not needed since buildtree.make explicitly includes defs.make where 
HS_ALT_MAKE is defined.

Webrev: http://cr.openjdk.java.net/~jwilhelm/8056056/webrev/

Bug: https://bugs.openjdk.java.net/browse/JDK-8056056

Thanks,
/Jesper