monet.m4: - initialize gcc to auto, so we can set initial values for CC and CXX   when --with-gcc is not used - use $gcc instead of non-extisting $GCC when setting the 32/64 bit related   flags - moved several AC/AM checks from AM_MONET_CLIENT to AM_MONET_COMPILER to   enforce the right order of:   - setting CC/CXX and adding 32/64 bit related flags   - setting LD and LDs 32/64 bit related flags
monet.m4:
- initialize gcc to auto, so we can set initial values for CC and CXX
  when --with-gcc is not used
- use $gcc instead of non-extisting $GCC when setting the 32/64 bit related
  flags
- moved several AC/AM checks from AM_MONET_CLIENT to AM_MONET_COMPILER to
  enforce the right order of:
  - setting CC/CXX and adding 32/64 bit related flags
  - setting LD and LDs 32/64 bit related flags

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb