gmtl: patch scons script to build on clang.

The upstream scons script only allows to compile using gcc, but not clang
gmtl: add 0.6.1 bottle.

Closes #32863.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
mongodb 2.7.7 (devel)
mongodb: update 2.6.4_1 bottle.