MAINT: Isolate hardcoded RTL name and vers. on Win.
MAINT: Isolate hardcoded RTL name and vers. on Win.

There are three concepts in the C runtime library used by Python on
Windows (from the Microsoft Visual C compiler); the internal build
number (e.g. 0x1600), the major version of the runtime (e.g. 10.0),
and the name of the link library of the runtime (e.g. msvcr100).

This patch separates getting these three values into separate functions
so that other code can be relieved of parsing the string return value
of the msvc_runtime_library function.

mhvk/numpy,mattip/numpy,mhvk/numpy,ahaldane/numpy,solarjoe/numpy,endolith/numpy,shoyer/numpy,jorisvandenbossche/numpy,madphysicist/numpy,bringingheavendown/numpy,solarjoe/numpy,pizzathief/numpy,utke1/numpy,ssanderson/numpy,behzadnouri/numpy,b-carter/numpy,WarrenWeckesser/numpy,pdebuyl/numpy,ssanderson/numpy,anntzer/numpy,ddasilva/numpy,WarrenWeckesser/numpy,anntzer/numpy,charris/numpy,solarjoe/numpy,mattip/numpy,jorisvandenbossche/numpy,bertrand-l/numpy,anntzer/numpy,ddasilva/numpy,tynn/numpy,ahaldane/numpy,simongibbons/numpy,chatcannon/numpy,madphysicist/numpy,chatcannon/numpy,pdebuyl/numpy,rgommers/numpy,madphysicist/numpy,pizzathief/numpy,jakirkham/numpy,b-carter/numpy,abalkin/numpy,ContinuumIO/numpy,ContinuumIO/numpy,Eric89GXL/numpy,jorisvandenbossche/numpy,shoyer/numpy,simongibbons/numpy,pbrod/numpy,WarrenWeckesser/numpy,MSeifert04/numpy,seberg/numpy,Eric89GXL/numpy,pdebuyl/numpy,gfyoung/numpy,anntzer/numpy,jakirkham/numpy,ahaldane/numpy,b-carter/numpy,pbrod/numpy,numpy/numpy,behzadnouri/numpy,ssanderson/numpy,madphysicist/numpy,rgommers/numpy,Eric89GXL/numpy,abalkin/numpy,charris/numpy,bringingheavendown/numpy,rgommers/numpy,charris/numpy,MSeifert04/numpy,bertrand-l/numpy,seberg/numpy,pizzathief/numpy,tynn/numpy,grlee77/numpy,ahaldane/numpy,ddasilva/numpy,Eric89GXL/numpy,MSeifert04/numpy,simongibbons/numpy,WarrenWeckesser/numpy,gfyoung/numpy,pizzathief/numpy,jorisvandenbossche/numpy,shoyer/numpy,mhvk/numpy,utke1/numpy,mattip/numpy,mhvk/numpy,jorisvandenbossche/numpy,pbrod/numpy,grlee77/numpy,pbrod/numpy,numpy/numpy,endolith/numpy,seberg/numpy,grlee77/numpy,behzadnouri/numpy,rgommers/numpy,numpy/numpy,endolith/numpy,ahaldane/numpy,ContinuumIO/numpy,madphysicist/numpy,utke1/numpy,WarrenWeckesser/numpy,mattip/numpy,bringingheavendown/numpy,seberg/numpy,MSeifert04/numpy,simongibbons/numpy,pdebuyl/numpy,numpy/numpy,charris/numpy,MSeifert04/numpy,grlee77/numpy,shoyer/numpy,abalkin/numpy,mhvk/numpy,grlee77/numpy,tynn/numpy,chatcannon/numpy,jakirkham/numpy,simongibbons/numpy,shoyer/numpy,jakirkham/numpy,pbrod/numpy,bertrand-l/numpy,gfyoung/numpy,endolith/numpy,pizzathief/numpy,jakirkham/numpy