missing papi dependency

[h4ck3rm1k3]

Thanks for the nice tool.

On debian,
it did not complain about the missing package libpapi-dev and did not even try and link,
needed to link like this :
gcc -o tiptop tiptop.o pmc.o process.o requisite.o conf.o screen.o debug.o version.o helpwin.o options.o hash.o spawn.o xml-parser.o target.o utils-expression.o error.o lex.yy.o y.tab.o -lxml2 -lcurses -lpapi

so need to add papi into the dependencies..
miike