Changes

Option useHigherMethodCounts Now Correctly Sets the scount

TR_UseHigherUserCounts now sets the intial scount to the value
of initial count after the initial count has been set, to avoid
the initial scount being set to -1

Measurements: when running acmeairee8 with
`-Xjit:useHigherMethodCounts -Xaot:useHigherMethodCounts`,
there is a 2% throughput improvement with 2.3% start-up
time increase

Signed-off-by: Luke Li <luke.li@ibm.com>
 (commit: a3143ad)