instead of re-assembling a list from the variables, take the original
command line minus some explicitly stripped out options. this is way
less code and poses no synchronization problem between the two parts.
as a "side effect", variables obtained from $QMAKEFLAGS won't multiply
with each makefile nesting level, as the generated command line won't
replicate data obtained from the environment.
Change-Id: I5d1ce0f11efb338f60405529f9818910103b1b0e
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>
4350054ab8