Fix GCC 4.0 link failure.
Better CXX_VERSION guessing.


config/ac-macros/misc.m4:
  Better CXX_VERSION guessing.
configure.in:
  CXX_VERSION guessing moved to misc.m4.
  HAVE_EXPLICIT_TEMPLATE_INSTANTIATION moved to config.h.
  Use compiler AR with MIPSpro and Forte instead of instantiating templates explicitly.
extra/yassl/src/crypto_wrapper.cpp:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
extra/yassl/src/template_instnt.cpp:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
extra/yassl/src/yassl_int.cpp:
  GCC 4.0 link fix. This file needs __cxa_pure_virtual.
extra/yassl/taocrypt/include/runtime.hpp:
  Fix GCC 4.0 link failure. Instruct compiler to always emit __cxa_pure_virtual even if
  it seems to be never used.
extra/yassl/taocrypt/include/types.hpp:
  Include config.h.
extra/yassl/taocrypt/src/algebra.cpp:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
extra/yassl/taocrypt/src/dh.cpp:
  GCC 4.0 link fix. This file needs __cxa_pure_virtual.
extra/yassl/taocrypt/src/dsa.cpp:
  GCC 4.0 link fix. This file needs __cxa_pure_virtual.
extra/yassl/taocrypt/src/integer.cpp:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
extra/yassl/taocrypt/src/rsa.cpp:
  GCC 4.0 link fix. This file needs __cxa_pure_virtual.
extra/yassl/taocrypt/src/template_instnt.cpp:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/field.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/item.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/item_buff.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/mysqld.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/opt_range.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/set_var.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/slave.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/sql_acl.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/sql_class.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/sql_insert.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/sql_map.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/sql_select.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/sql_show.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.
sql/table.cc:
  EXPLICIT_TEMPLATE_INSTANTIATION renamed to HAVE_EXPLICIT_TEMPLAE_INSTANTIATION.