add source to libraries, and cruft for building under windows

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diff --git a/linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/mips3/README b/linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/mips3/README
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+This directory contains mpn functions optimized for MIPS3.  Example of

+processors that implement MIPS3 are R4000, R4400, R4600, R4700, and R8000.

+

+RELEVANT OPTIMIZATION ISSUES

+

+1. On the R4000 and R4400, branches, both the plain and the "likely" ones,

+   take 3 cycles to execute.  (The fastest possible loop will take 4 cycles,

+   because of the delay insn.)

+

+   On the R4600, branches takes a single cycle

+

+   On the R8000, branches often take no noticable cycles, as they are

+   executed in a separate function unit..

+

+2. The R4000 and R4400 have a load latency of 4 cycles.

+

+3. On the R4000 and R4400, multiplies take a data-dependent number of

+   cycles, contrary to the SGI documentation.  There seem to be 3 or 4

+   possible latencies.

+

+STATUS

+

+Good...