#184 Optimization filter/exclusion

[Dyorgio]

Include support to dont optimize -keep* filters, like:

# Today
-keep class com.sun.jna.** {*.}

# Propose
-keep,dontoptimize class com.sun.jna.** {*.}

or explicity -dontoptimize filter, like:

# Propose 2
-dontoptimize class com.sun.jna.**