Stop using automake. Replaced each Makefile.am with a hand-written

Makefile.in.
* configure.ac: New output variable CCPIC_MAYBE. New output file
config.make. Replaced automake constructions.

Rev: src/nettle/Makefile.am:1.81(DEAD)
Rev: src/nettle/Makefile.in:1.1
Rev: src/nettle/configure.ac:1.45
Rev: src/nettle/examples/Makefile.am:1.22(DEAD)
Rev: src/nettle/examples/Makefile.in:1.1
Rev: src/nettle/testsuite/Makefile.am:1.42(DEAD)
Rev: src/nettle/testsuite/Makefile.in:1.1
Rev: src/nettle/tools/Makefile.am:1.8(DEAD)
Rev: src/nettle/tools/Makefile.in:1.1