Revert "linux PMDA: provide GNUmakefile hook to change gcc optimization"
Revert "linux PMDA: provide GNUmakefile hook to change gcc optimization"

This reverts commit 506c442696148d9823765b9e288ddb3038c1189b.

This commit served to demonstrate that the gcc problem really
exists, but was insufficient to allow Makepks to optionally build
without -O2 optimization ... a bigger configure hammer is needed
for this, and follows in a subsequent commit.

adfernandes/pcp,aeg-aeg/pcpfans,adfernandes/pcp,aeg-aeg/pcpfans,adfernandes/pcp,wuliming/pcp,adfernandes/pcp,wuliming/pcp,adfernandes/pcp,wuliming/pcp,adfernandes/pcp,aeg-aeg/pcpfans,wuliming/pcp,aeg-aeg/pcpfans,wuliming/pcp,aeg-aeg/pcpfans,wuliming/pcp,adfernandes/pcp,aeg-aeg/pcpfans,adfernandes/pcp,wuliming/pcp,wuliming/pcp,aeg-aeg/pcpfans,aeg-aeg/pcpfans