CFLAGS and SunPRO linkage

[Joerg Sonnenberger]

Hi,
at the moment, linkage on Solaris with SunPRO will fail, if CFLAGS is
set in the environment. This is a consequenec of skipping auto/cc/sunc,
which sets NGX_AUX to the assembler routines implementing
ngx_atomic_fetch_add and co. Shouldn't the compiler specific routines
generally be run, but CPU_OPT and NGX_CPU_CACHE_LINE ignored if CFLAGS
was already set?

Joerg