[COMMITTERS] pgsql: Add configure test to see if the C compiler has gcc-stylecomput

Add configure test to see if the C compiler has gcc-style computed gotos.

We'll need this for the upcoming patch to speed up expression evaluation.
Might as well push it now to see if it behaves sanely in the buildfarm.

Andres Freund

Discussion: https://postgr.es/m/20170320062511.hp5qeurtxrwsvfxr@alap3.anarazel.de

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/bc18126a6bcb85b51dc082c3ef4417dc016ebd9c

Modified Files
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config/c-compiler.m4          | 24 ++++++++++++++++++++++++
configure                     | 34 ++++++++++++++++++++++++++++++++++
configure.in                  |  1 +
src/include/pg_config.h.in    |  3 +++
src/include/pg_config.h.win32 |  3 +++
5 files changed, 65 insertions(+)